The value of the tangent segment b is 20.15.
What is the value of side b?The secant-tangent power theorem, also known as the tangent-secant theorem, states that if a tangent and a secant are drawn from a common external point to a circle, then the product of the length of the secant segment and its external part is equal to the square of the length of the tangent segment.
It is expressed as:
( tangent segment )² = External part of the secant segment + Secant segment.
From the diagram:
Tangent segment = WX = b
External part of the secant segment = YX = 14
Secant segment = ZX = 15 + 14 = 29
Plug these values into the above formula and solve for b.
( tangent segment )² = External part of the secant segment + Secant segment.
b² = 14 × 29
b² = 406
b = √406
b = 20.15
Therefore, the value of b is 20.15.
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The graph of the function p(x) is represented below. On the same set of axes, sketch the function p(x + 2).
A graph of the function p(x) and the function p(x + 2) is shown below.
How to determine the factored form of a quadratic equation?In Mathematics, the vertex form of a quadratic function is represented by the following mathematical equation:
f(x) = a(x - h)² + k
Where:
h and k represents the vertex of the graph.a represents the leading coefficient.Based on the information provided above, we can determine the value of a as follows:
f(x) = a(x - h)² + k
0 = a(-3 - 0)² + 4
0 = 9a + 4
a = -4/9
Therefore, the required quadratic function is given by:
f(x) = a(x - h)² + k
p(x) = y = -4/9(x - 0)² + 4
p(x + 2) = -4/9(x + 2)² + 4
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Missing information:
The question is incomplete and the complete question is shown in the attached picture.
Which of the fraction, decimai, percent equivalencies are correct? Select THREE correct answers
The fractions, decimals, and percent equivalencies that are correct are:
b. 3/8 = 0.375 = 37.5%
c. 24% = 0.24 = 6/25
e. 24/30 = 80% = 0.8
What are fractions, decimals, and percentages?A fraction is a part of a whole.
The number is represented mathematically as a quotient, where the numerator and denominator are split.
In a simple fraction both the numerator and denominator are integers.
In a complex fraction, a fraction appears in the numerator or denominator.
In a proper fraction, the numerator is less than the denominator.
A decimal is a fraction that contains a decimal point.
A percentage is a value out of 100 parts.
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If f(x) = 3x² - 3, find x = 2
Answer:
The answer is 9
Step-by-step explanation:
When x = 2,
f(2) = 3×2^2-3
f(2) = 3×4-3
f(2) = 12-3
f(2)= 9
Doors&Windows, Inc. Makes, you guessed it, doors and windows. Each day, Doors&Windows orders 6,150 linear feet of framing material and has a few staff member who are able to work a collective 600 hours. For each window, Doors&Windows profits $40 requiring 6 labor hours and 30 linear feet of framing material. For each table, Doors&Windows profits $90 requiring 10 labor hours and 120 linear feet of framing material. Due to the availability of glass, they can only produce a maximum of 70 windows. When formulating this problem as a linear programming model, what are the decision variables?
Decision variables in Doors&Windows linear programming model.
How to formulate linear programming?The decision variables in the linear programming model for this problem are the number of windows (W) and the number of tables (T) that Doors&Windows should produce to maximize their profit while meeting the constraints. The objective function to maximize would be the total profit, which can be expressed as 40W + 90T. The constraints include the available linear feet of framing material (6150) and labor hours (600), which can be written as 30W + 120T ≤ 6150 and 6W + 10T ≤ 600, respectively. Additionally, the maximum number of windows that can be produced (W ≤ 70) due to glass availability is also a constraint. These decision variables and constraints can be used to create a linear programming model to optimize Doors&Windows' production and profit.
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The surface area of a triangular pyramid is 450 square meters. The surface area of a similar triangular pyramid is 50 square meters.
What is the ratio of corresponding dimensions of the smaller pyramid to the larger pyramid?
The ratio of the corresponding dimensions of the smaller pyramid to the larger pyramid is 1/3.
What is a dimension?Dimension is the measure of the distance or length of an obeject.
To calculate the ratio of the corresponding dimensions of the smaller pyramid to the larger pyramid, we use the formula below
Formula:
l/L = √(a/A) ........................ Equation 1
Where:
l/L = Ratio of the dimension of the smaller pyramid to the larger onea = Area of the smaller pyramidA = Area of the larger pyramidFrom the question,
Given:
a = 50 m²A = 450 m²Substitute these values into equation 1
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can yall help me with this and this is due today!
a) The experimental probability of rolling an even number is given as follows: 12/25.
b) The theoretical probability of rolling an even number is given as follows: 1/2.
c) With a large number of trials, there might be a difference between the experimental and the theoretical probabilities, but the difference should be small.
How to calculate a probability?A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.
The number of trials in which an even number is rolled is given as follows:
88 + 69 + 83 = 240.
Hence the experimental probability is given as follows:
240/500 = 12/25.
For each roll, 3 out of 6 numbers are even, hence the theoretical probability is given as follows:
p = 3/6
p = 1/2.
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A study was conducted to determine the relationship existing between the grade in english and the grade in mathematics. a random sample of 10 cte students in uc were taken and the following are the results of the sampling th a)compute for the pearson( r) - 10pts b) state null and alternative hypothesis- 5pts b)find equation of regression line- 5pts c) interpret and conclude results - 5pts student 1 2 3 4 5 6 7 8 9 10 english 75 83 80 77 89 78 92 86 93 84 mathematics 78 87 78 76 92 81 89 89 91 84
a) The Pearson correlation coefficient is 0.76.
b) Null hypothesis: There is no significant correlation between the grades in English and Mathematics (H0: r = 0)
Alternative hypothesis: There is a significant correlation between the grades in English and Mathematics (Ha: r ≠ 0)
c) The regression line is: y = 0.64x + 34.18
d) Interpretation and conclusion: The Pearson correlation coefficient (r) of 0.76 indicates a strong positive correlation between the grades in English and Mathematics.
Correlation analysis:
Using the Pearson correlation coefficient to measure the strength and direction of the linear relationship between two variables.
Hypothesis testing:
Setting up null and alternative hypotheses, and using the t-test to determine whether the correlation coefficient is statistically significant.
Linear regression:
Finding the equation of the regression line that best describes the relationship between the two variables.
Interpretation and conclusion:
Using the results of the analysis to draw meaningful conclusions about the relationship between the two variables and the sample population as a whole.
Here we have
A study was conducted to determine the relationship existing between the grade in English and the grade in mathematics. a random sample of 10 students in uc was taken and the following are the results of the sampling
Student 1 2 3 4 5 6 7 8 9 10
English 75 83 80 77 89 78 92 86 93 84
Mathematics 78 87 78 76 92 81 89 89 91 84
a) To compute the Pearson correlation coefficient (r), first calculate the mean, standard deviation, and covariance of the two variables:
Mean of English grades (x)
= (75+83+80+77+89+78+92+86+93+84)/10 = 83.7
Mean of Math grades (y)
= (78+87+78+76+92+81+89+89+91+84)/10 = 84.5
The standard deviation of English grades (Sx)
= √((75-83.4)²+(83-83.4)²+...+(84-83.4)²)/9) = 6.52
The standard deviation of Math grades (Sy)
= √((78-84.4)²+(87-84.4)²+...+(84-84.4)²)/9) = 5.47
Covariance of the two variables
= ((75-83.4)(78-84.4)+(83-83.4)(87-84.4)+...+(84-83.4)(84-84.4))/9 = 26.6
Using the formula, r = cov(X,Y)/(SxSy),
we can calculate the correlation coefficient as follows
r = 26.6/(6.52*5.47) = 0.76
Therefore,
The Pearson correlation coefficient is 0.76.
b) Null hypothesis: There is no significant correlation between the grades in English and Mathematics (H0: r = 0)
Alternative hypothesis: There is a significant correlation between the grades in English and Mathematics (Ha: r ≠ 0)
c) To find the equation of the regression line, we need to calculate the slope (b) and the intercept (a) of the line. The formula for the slope is:
b = r(Sy/Sx) = 0.76(5.47/6.52) = 0.64
The formula for the intercept is:
=> a = y - bx = 84.4 - 0.64(83.4) = 34.18
Therefore,
The equation of the regression line is:
y = 0.64x + 34.18
Interpretation and conclusion:
The Pearson correlation coefficient (r) of 0.76 indicates a strong positive correlation between the grades in English and Mathematics.
The p-value associated with this correlation coefficient can be used to test the null hypothesis.
The equation of the regression line shows that for every one-point increase in the English grade, the predicted increase in the Mathematics grade is 0.64 points.
Therefore,
a) The Pearson correlation coefficient is 0.76.
b) Null hypothesis: There is no significant correlation between the grades in English and Mathematics (H0: r = 0)
Alternative hypothesis: There is a significant correlation between the grades in English and Mathematics (Ha: r ≠ 0)
c) The regression line is: y = 0.64x + 34.18
d) Interpretation and conclusion: The Pearson correlation coefficient (r) of 0.76 indicates a strong positive correlation between the grades in English and Mathematics.
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Estimate the solution to the system of equations. You can use the interactive graph below to find the solution.
7x−y=7
x+2y=6
Choose 1 answer:
(Choice A): x=1 1/3, y=1 1/3
(Choice B): x=2 1/3, y=2 1/3
(Choice C):x=2 1/3, y=1 1/3
(Choice D):x=1 1/3, y=2 1/3
Answer:
the answer is D
Step-by-step explanation:
Answer:
C. x = 2 1/3, y = 1 1/3.
Step-by-step explanation:
To solve this question, we need to plot the two equations on the graph and see where they cross. The graph below shows the two lines in different colors:
We can see that the point of intersection is somewhere between (1, 2) and (2, 1). Looking at the given options, we can see that only one of them is in that range. That is option C. x = 2 1/3, y = 1 1/3. Therefore, the answer is C. x = 2 1/3, y = 1 1/3.The preimage and image of WXYZ are shown. Use coordinate notation to describe the translation.
The image of WXYZ moves two unit to the right and 5 unit down. The coordinate is (x+2, y-5).
The polar system of coordinates is a coordinate system with two dimensions in which the location of each point can be determined by its distance from the origin, a fixed point, and its angle from the polar axis, also known as the polar axis of rotation. A ray beginning at the origin and extending outward at a set angle, typically 0 degrees or horizontal, is how the polar axis is typically depicted. The image of WXYZ moves two unit to the right and 5 unit down. The coordinate is (x+2, y-5).
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Ethan wrote the number below.
Lucy wrote another number in which the value of the digit 5 is 10 times larger than it is in Ethans number. Which number could be Lucy's number?
A. 4982.58
B. 4945.82
C. 4974.65
D. 4958.03
The answer would be D
Since Lucy's number has a digit of 5 which is 10x greater than Ethan's number, 5 x 10 = 50; so 50 would be in the tenth place, and option d is the only one with 5 in the tenth place.
The value of a number moves one decimal place to the left for each position it moves to the right. So, the number that Lucy could have written where the number 5 has a value 10 times larger than Ethan's number is 4974.65.
Explanation:In order for the value of the digit 5 to be 10 times larger in Lucy's number than it is in Ethan's, the '5' in Lucy's number should reside one place left compared to Ethan's. This means the 5 should be in the tens place, hundreds place, or beyond. So, we should look for a number having digit 5 at those places.
Let's examine the given options:
A. 4982.58 - '5' is in the hundredths place, which makes its value smaller, not larger.B. 4945.82 - '5' is in the ones place. No change in value.C. 4974.65 - '5' is in the tens place, making its value 10 times larger than if it were in the ones place.D. 4958.03 - '5' is in the thousands place, which makes its value even larger, but more than 10 times.Therefore, the correct answer is C. 4974.65.
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Calculate the derivatives of all orders: f'(x), F"(x), F"(x), f(4)(x), ..., f(n)(x), ... f(x) = (-2x + 1)3 f'(x) f''(x) = f''(x) = f(4)(x) = f(n) (x) for all n 25
The first derivative of f(x) is f'(x) = -12(-2x + 1)2. The second derivative is f''(x) =48(-2x + 1), and all higher derivatives have the form f^(n)(x) = (-1)n * 6 * n! * (-2x + 1)^(3-n).
To calculate the derivatives of all orders for f(x) = (-2x + 1)3, we first need to find the first derivative:
f(x) = (-2x + 1)³
f'(x) = 3(-2x + 1)²(-2)
f'(x) = 3(-2x + 1)²(-2)
f'(x) = -12(-2x + 1)2
Next, we find the second derivative:
f''(x) = d/dx(-12(-2x + 1)²)
f''(x) = 2(-2)(-12)(-2x + 1)
f''(x) = -12[2(-2x + 1)(-2)]
f''(x)= 48(-2x + 1)
We can continue this process to find the third and fourth derivatives:
f'''(x) = d/dx(96(-2x + 1))
f'''(x) = -384
f''''(x) = d/dx(-384)
f''''(x) = 0
Notice that the fourth derivative is 0, meaning that all higher derivatives will also be 0.
This is because the original function is a polynomial of degree 3, so its fourth derivative will be the derivative of a constant, which is 0.
Therefore, we can conclude that:
f(4)(x) = 0
f(n)(x) = 0 for all n ≥ 4.
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A particle moves on a coordinate line with acceleration a = d^2s/dt^2 = 15 sqrt(t) - (3/sqrt(t)), subject to the conditions that ds/dt = 4 and s = 0 when t = 1. Find a. the velocity y = ds/dt in terms of t. b. the position s in terms of t.
a.The velocity function is: v = ds/dt = (2/5)t^(5/2) - 6t^(1/2) + 16.
b. The position function is: s = (4/35)t^(7/2) - 8t^(3/2) + 16t - 12.
a. To find the velocity, we need to integrate the acceleration function. We get:
v = ds/dt = ∫a dt = ∫(15√t - 3/t^(1/2)) dt
Integrating the first term, we get (2/5)t^(5/2), and integrating the second term, we get -6t^(1/2) + C. Thus, the velocity function is:
v = ds/dt = (2/5)t^(5/2) - 6t^(1/2) + C
We can find the constant C using the initial condition that ds/dt = 4 when t = 1. Substituting these values into the equation, we get:
4 = (2/5)(1)^(5/2) - 6(1)^(1/2) + C
C = 4 + 12 = 16
Therefore, the velocity function is:
v = ds/dt = (2/5)t^(5/2) - 6t^(1/2) + 16
b. To find the position function, we need to integrate the velocity function. We get:
s = ∫v dt = ∫((2/5)t^(5/2) - 6t^(1/2) + 16) dt
Integrating the first term, we get (4/35)t^(7/2), integrating the second term, we get -8t^(3/2), and integrating the third term, we get 16t. Thus, the position function is:
s = ∫v dt = (4/35)t^(7/2) - 8t^(3/2) + 16t + C2
We can find the constant C2 using the initial condition that s = 0 when t = 1. Substituting these values into the equation, we get:
0 = (4/35)(1)^(7/2) - 8(1)^(3/2) + 16(1) + C2
C2 = -12
Therefore, the position function is:
s = (4/35)t^(7/2) - 8t^(3/2) + 16t - 12
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A group of 150 dancers are auditioning for a dance show. 93 of the dancers trying out did not get on the show. What percentage of the dancers didn’t get in the show?
62% of the dancers did not get into the show.
To find the percentage of dancers who did not get into the show.
First, identify the total number of dancers auditioning and the number of dancers who did not get into the show.
In this case, there are 150 dancers in total, and 93 of them did not get in.
Next, divide the number of dancers who did not get into the show by the total number of dancers auditioning.
This will give us the proportion of dancers who did not get in.
Proportion = (Number of dancers who did not get in) / (Total number of dancers)
Proportion = 93 / 150
Finally, to find the percentage, multiply the proportion by 100:
Percentage = Proportion * 100
Percentage = (93 / 150) * 100.
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Jackson makes fruit punch by mixing the ingredients listed below.
6 cups of orange juice
5 pints of fruit punch
8 cups of apple juice
How many quarts of fruit punch does Jackson make?
A.3
B.6
C.24
D.96
Answer: B
Step-by-step explanation:
First, let's convert the 5 pints of fruit punch to cups:
5 pints = 5 x 2 cups/pint = 10 cups
Now we can add up the cups of each ingredient:
6 cups of orange juice + 10 cups of fruit punch + 8 cups of apple juice = 24 cups
Since there are 4 cups in a quart, we can divide by 4 to get the number of quarts:
24 cups ÷ 4 cups/quart = 6 quarts
Therefore, Jackson makes 6 quarts of fruit punch.
The volume of a cylinder is 336m3 . what is the volume of a cone with the same radius and height?
Question 2 of 10
The graph of y=-2x + 10 is:
OA. a point that shows the y-intercept.
OB. a line that shows the set of all solutions to the equation.
OC. a line that shows only one solution to the equation.
D. a point that shows one solution to the equation.
Answer:
The graph of y = -2x + 10 is B) a line that shows the set of all solutions to the equation.------------------------------------------------
A linear equation is an equation of a straight line.
It describes the straight-line graph of a set of ordered pairs (x, y) that are solutions to the equation.
There are different forms of linear equations.
The slope-intercept form of a linear equation is y = mx + b.
The equation y = -2x + 10 is in slope-intercept form. Its graph is a line with slope -2 and y-intercept 10. It shows the set of all solutions to the equation.
As per description above, the correct answer choice is B, all the other options are false.
calculate div(f) and curl(f). f = 5ey, 2 sin(x), 9 cos(x)
Div(f) = 2cos(x) + [tex]5e^y[/tex], and curl(f) = < 0, 9sin(x), 5e^y >.
To calculate div(f) and curl(f), we need to express f as a vector field:
f = < 2 sin(x), [tex]5e^y[/tex][tex]5e^y[/tex], 9 cos(x) >
Then, we can use the formulas for divergence and curl:
div(f) = ∂f₁/∂x + ∂f₂/∂y + ∂f₃/∂z
curl(f) = < ∂f₃/∂y - ∂f₂/∂z, ∂f₁/∂z - ∂f₃/∂x, ∂f₂/∂x - ∂f₁/∂y >
Let's compute these step by step:
div(f) = ∂f₁/∂x + ∂f₂/∂y + ∂f₃/∂z
= 2cos(x) + [tex]5e^y[/tex] + 0
= 2cos(x) + [tex]5e^y[/tex]
curl(f) = < ∂f₃/∂y - ∂f₂/∂z, ∂f₁/∂z - ∂f₃/∂x, ∂f₂/∂x - ∂f₁/∂y >
= < 0 - 0, 0 - (-9sin(x)), 5e^y - 0 >
= < 0, 9sin(x), 5e^y >
Therefore, div(f) = [tex]2cos(x) + 5e^y[/tex], and curl(f) = [tex]< 0, 9sin(x), 5e^y > .[/tex]
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will mark brainlist for anyone who do step by step correctly and make sure it's not no other answers that is not on the answer choice.
An image of a rhombus is shown.
What is the area of the rhombus?
224 cm2
120 cm2
112 cm2
60 cm2
Answer:224cm^2
Step-by-step explanation:
Formula for the area of a parallelogram is base x height (b x h) so we do 14x16 which is 224.
The square below has an area of x^ 2 − 12 x + 36 What expression represents the length of one side of the square?
The length of one side of the square is x - 6 units
How to determine the lengthThe formula for calculating the area of a square is expressed as;
A = a²
Such that the a is the length of its side
From the information given, we have that;
Area = x^ 2 − 12 x + 36
solve the quadratic expression, we have that;
x² - 6x - 6x + 36
group in pairs
(x²- 6x) - (6x + 36)
factorize the terms
x(x - 6) - 8(x - 6)
Then, we have;
(x - 6) and (x - 6) units
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Q=1/6p^2
p= 13. 6 correct to 3 significant figures.
By considering bounds, work out the value of q to a suitable degree of accuracy.
Give a reason for your answer.
+
The value of Q, taking into account the significant figures is 30.8.
To work out the value of Q given the value of p, we can substitute the value of p into the equation Q = (1/6) × p².
Given p = 13.6, we can calculate Q as follows:
Q = (1/6) × (13.6)²
Q = (1/6) × 184.96
Q = 30.826666...
Now, let's consider the significant figures of the given value of p, which is 13.6 (3 significant figures).
Since the value of p has 3 significant figures, we should round our final answer for Q to 3 significant figures as well.
Considering the value of Q to a suitable degree of accuracy, we can round our answer to three significant figures, which gives us:
Q = 30.8
Therefore, the value of Q, taking into account the significant figures, is 30.8.
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The surface area of a right-circular cone of radius r and height his S = πr √ r²+h² , and its volume is V = 1/3πr²h. (a) Determine h and r for the cone with given surface area S = 8 and maximal volume V. h = (4/(3pi^2))^(1/4) r = (1/(3p1^2))^(1/4) (b) What is the ratio h/r for a cone with given volume V = 5 and minimal surface area S? h/r = sqrt2 (c) Does a cone with given volume V and maximal surface area exist?
The height and radius of the cone with maximal volume V and surface area S = 8 are h = (4/(3π^2))^(1/4) and r = (1/(3π^2))^(1/4),
respectively.Explanation: To find the height and radius of the cone with maximal volume and surface area of 8, we need to use the formulas for the surface area and volume of a right-circular cone in terms of r and h. We can then use the method of Lagrange multipliers to find the values of r and h that maximize the volume subject to the constraint that the surface area is equal to 8.Using the formulas for the surface area and volume of a cone, we get:S = πr √(r²+h²)V = 1/3πr²hWe can then set up the Lagrangian function L(r,h,λ) = 1/3πr²h + λ(πr √(r²+h²) - 8), where λ is the Lagrange multiplier.Taking the partial derivatives of L with respect to r, h, and λ and setting them equal to zero, we get:∂L/∂r = 2/3πrh + λ(π√(r²+h²) + r²/√(r²+h²)) = 0∂L/∂h = 1/3πr² + λ(πh/√(r²+h²)) = 0∂L/∂λ = πr √(r²+h²) - 8 = 0Solving these equations, we get:h = (4/(3π^2))^(1/4)r = (1/(3π^2))^(1/4)Therefore, the height and radius of the cone with maximal volume and surface area of 8 are h = (4/(3π^2))^(1/4) and r = (1/(3π^2))^(1/4), respectively.(b) The ratio of height to radius for the cone with minimal surface area S and volume V = 5 is h/r = √2.Explanation: Using the formulas for the surface area and volume of a cone in terms of r and h, we can set up the following optimization problem:Minimize S = πr √(r²+h²)Subject to V = 1/3πr²h = 5Using the method of Lagrange multipliers, we can set up the Lagrangian function L(r,h,λ) = πr √(r²+h²) + λ(1/3πr²h - 5), where λ is the Lagrange multiplier.Taking the partial derivatives of L with respect to r, h, and λ and setting them equal to zero, we get:∂L/∂r = π√(r²+h²) + 2λr/3πh = 0∂L/∂h = πr²h/√(r²+h²) - 5λ/3π = 0∂L/∂λ = 1/3πr²h - 5 = 0Solving these equations, we get:h/r = √2Therefore, the ratio of height to radius for the cone with minimal surface area S and volume V = 5 is h/r = √2.(c) No, a cone with given volume V and maximal surface area does not exist.Explanation: Using the formulas for the surface area and volume of a cone in terms of r and h, we can set up the following optimization problem:Maximize S = πr √(r²+h²)Subject to V = 1/3πr²hUsing the method of Lagrange multipliers, we can set up the Lagrangian function L(r,h,λ) = πr √(r²+h²) + λ(1/3πr²h - V), where λ is the Lagrange multiplier.Taking the partial derivatives of L with respect to r, h, and λ and setting them equal to zero, we get:∂L/∂r = π√(r²+h²) + 2λr/3πh = 0∂L/∂h = πr²h/√(r²+h²) - λ/3πr² = 0∂L/∂λ = 1/3πr²h - V = 0Solving these equations, we get:h = rr³ = 3V/πSubstituting h = r into the surface area formula, we get:S = 2
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. The volume of a sphere is 6,000π m^3. What is the surface area of the sphere to the nearest square meter?
*
18850 m^2
33 m^2
1090 m^2
3425 m^2
The correct option is the last one, the surface is 3425 m²
How to get the surface area of the sphere?Remember that for a sphere of radius R, the volume is:
V = (4/3)pi*R³
S = 4pi*R²
Where pi = 3.14
Here the volume is 6,000π m³, then the radius will be:
R =∛( (3/4)*6,000m³)
R = 16.51 m
Then the surface area is:
[tex]S = 4*3.14*( 16.51 m)^2 = 3,424 m^2[/tex]
The option that is closser to it is the fourth one, so that is the correct option.
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the length of a rectangle is 4 cm less than the twice of the width. if the perimeter is 178 cm what is the width of the rectangle?
Answer: 31
Step-by-step explanation:
We know that the perimeter is equal to 2W + 2L.
178 cm = 2W + 2L
We also know that the length is 4 cm less than twice the width.
L = 2W - 4
We will create a system of equations. Then we will solve with substitution.
178 cm = 2W + 2L
L = 2W - 4
178 cm = 2W + 2L
178 cm = 2W + 2(2W - 4 cm)
178 cm = 2W + 4W - 8 cm
178 cm = 6W - 8 cm
186 cm = 6W
W = 31
Answer:
31 cm
Step-by-step explanation:
First, we choose two variables.
Let W = width.
Let L = length.
The perimeter of a rectangle is:
perimeter = 2(L + W)
Now we translate the statements of the problem into two equations.
"the perimeter is 178 cm"
2(L + W) = 178
Divide both sides by 2:
L + W = 89
"the length of a rectangle is 4 cm less than the twice of the width"
L = 2W - 4
We have a system of equations:
L + W = 89
L = 2W - 4
Rewrite the first equation:
L + W = 89
Since the second equation is already solved for L, we can easily use the substitution method.
Substitute 2W - 4 for L in the equation above.
2W - 4 + W = 89
Combine like terms on the left side.
3W - 4 = 89
Add 4 to both sides.
3W = 93
Divide both sides by 3.
W = 31
Answer: The width is 31 cm
Check:
The length is 4 cm less than twice the width. 2 × 31 cm - 4 cm = 58 cm
The length is 58 cm, and the width is 31 cm. Calculate the perimeter.
P = 2(L + W) = 2(58 cm + 31 cm) = 2(89 cm) = 178 cm
The perimeter is 178 cm as the problem states, so the answer, width = 31 cm, is correct.
Please help I need the code asap
The values based on the exponent will be:
0.024
5670
41952
0.005
73
0.34
900
6
How to calculate the valuesThe exponent is the number of times that a number is multiplied by itself. It should be noted that the power is an expression which shows the multiplication for the same number. For example, in 6⁴ , 4 is the exponent and 6⁴ is called 6 raise to the power of 4.
1) 2.4 × 10^-2 = 0.024
2) 5.67 x 10^3 = 5670
3) 4.1952 x 10^4 = 41952
4) 5 × 10^-3 = 0.005
5) 7.3 × 10^1 = 73
6) 3.4 × 10-1 = 0.34
7) 9 × 10^2 = 900
8) 6 × 10*0 = 6
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7. If angle GFE ~ angle CBE, find FE.
The value of FE comes out to be 35.
What is angle?An angle is a geometric figure formed by two rays or line segments that share a common endpoint, called the vertex. The measure of an angle is typically given in degrees or radians, and it describes the amount of rotation needed to move one of the rays or line segments to coincide with the other. Angles are used in many areas of mathematics, physics, engineering, and other sciences to describe and analyze various phenomena.
What is parallel line?Parallel lines have the same slope and will never meet, no matter how far they are extended. Parallel lines are important in geometry and other areas of mathematics, as well as in engineering, architecture, and other fields where precise measurements and constructions are required.
[tex]4x-1/x+5 = 60/24\\5x+25= 8x-2\\27= 3x\\x=9[/tex]
Therefore FE= 4×(9)-1
=35
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HELP! WILL GIVE BRAINLIEST!
A yard stick is placed on the table during a party game. A marker is placed at 11 inches, and labeled A, one labeled B at 24 inches, another labeled C at 26 and another labeled D at 36. A marble is shot toward the yard stick. What is the probability that the marble that hits the yard stick between A and D hits it between C and D? Write your answer as a percent
The required probability 40%
To find the probability that the marble that hits the yard stick between A and D hits it between C and D, we need to find the length of the interval between C and D, and divide it by the length of the interval between A and D.
The length of the interval between C and D is
36 - 26 = 10
The length of the interval between A and D is
36 - 11 = 25
The probability that a marble will strike a yardstick between A and D and C and D is
10/25 × 100 = 40%
Therefore, the probability that a marble will strike a yardstick between A and D and C and D is 40%
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Jaoan reads that themass of an average elephant's brain is 3 4/10 kilograms greater than an average man's brain. How many kilograms is an average elephant's brain?
Answer:
Step-by-step explanation:
Let's call the mass of an average man's brain "m."
According to the problem, the mass of an average elephant's brain is 3 4/10 kilograms greater than an average man's brain. We can write this as:
mass of elephant's brain = m + 3 4/10
To find out how many kilograms an average elephant's brain weighs, we need to know the value of "m." However, this information is not given in the problem.
Therefore, we cannot determine the exact mass of an average elephant's brain.
Construct a 95% confidence interval for the true average monthly salary earned by all employees of People Plus Pty, if it was found that the average monthly salary earned by a sample of 19 employees of the company was R18 500, with a standard deviation of R1 750. Interpret your answer
We can be 95% confident that the true average monthly salary earned by all employees of People Plus Pty is between R16 234.49 and R20 765.51. This means if created for several samples of the same size taken from the population, would contain the actual population mean.
To construct a 95% confidence interval for the true average monthly salary earned by all employees of People Plus Pty, we can use the following formula:
CI = x ± t(α/2, n-1) * (s/√n)
where:
x = sample mean = R18 500
s = sample standard deviation = R1 750
n = sample size = 19
t(α/2, n-1) = t-score at α/2 and n-1 degrees of freedom
Using a t-table or calculator with 18 degrees of freedom (n-1), we can find the t-score at α/2 = 0.025 to be 2.101.
Plugging in the values, we get:
CI = 18500 ± 2.101 * (1750/√19)
= (16234.49, 20765.51)
Therefore, we can be 95% confident that the true average monthly salary earned by all employees of People Plus Pty is between R16 234.49 and R20 765.51.
This means that if we were to take multiple samples of the same size from the population and construct 95% confidence intervals for each sample mean, about 95% of those intervals would contain the true population mean.
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Help with problem in photo!
Check the picture below.
[tex]4+10x=\cfrac{(9x+20)+10x}{2}\implies 8+20x=19x+20\implies x=12 \\\\[-0.35em] ~\dotfill\\\\ 4+10x\implies 4+10(12)\implies \stackrel{ \measuredangle DEC }{124^o}[/tex]
Mirrors kitchen sink holds up to 108.460 L of water runs amount to the nearest liter
The statement mentions that the kitchen sink has a capacity of 108.460 L of water and it is important to round up the amount to the nearest liter. When we round up the capacity of the sink, it comes out to be 108 liters. This means that the sink can hold up to 108 liters of water at maximum capacity.
It is important to have an idea of the sink’s capacity in terms of liters because it helps in managing the amount of water used while washing dishes or other household items. It is also beneficial to know the capacity of the sink while filling it with water for cleaning purposes, as it prevents the sink from overflowing.
Overall, the capacity of a sink is an important factor to consider while designing a kitchen or bathroom as it ensures proper functionality and prevents any damage to the surrounding areas due to overflowing water. So, it is always advisable to check the capacity of a sink before installing it in a household.
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Complete Question : Mirrors kitchen sink holds up to 108.460 L of water. Round this amount to the nearest liter.