Sam wants to earn at least a B in Math. He earned the following scores on tests so far: 82%, 70%, 72%, and 80%.
Which inequality below can be used to solve and determine what Sam needs to earn on the final exam in order to have at least a B-average in the class?
Answer:
Sam has to get at least a 96 in order to pass the class with a B.
Step-by-step explanation:
To find this you use mean in this format:
Test Scores + x (Exam Grade Needed) / # of Tests ≥ 80 (Which Is a B)
Substitute:
82 + 70 + 72 + 80 + x / 5 ≥ 80
Add:
304 + x / 5 ≥ 80
Get Rid of the Denominator (Multiply Both Sides By 5):
(5) 304 + x / 5 ≥ 80 (5)
Multiply:
304 + x ≥ 400
Isolate x (Subtract 304 From Both Sides):
x ≥ 96
This means that Sam has to get at least (Greater than or equal to) a 96 in order to pass with a B average.
HELP ME IN THIS QUESTION PLSS
Answer:
Rational, irrational, rational, irrational
Step-by-step explanation:
-115.5: all negative numbers are rational
23.083: 3 is recurring- recurring numbers are irrational
2 under root 9 = 6
the number goes on without a pattern= irrational
Find the slope of the line $3x+5y=20$.
Ans-
-3/5 is the slope.
Step-by-step explanation:
3x+5y=20
5y= -3x + 20
y= -3/5x + 20
m= -3/5
what is the property
3• 1/3 =1
Answer:
True
Step-by-step explanation:
3 • 1/3 = 1
~Turn the whole number into a fraction
3/1 * 1/3 = 1
~Multiply
3/3 = 1
~Simplify
1 = 1
Best of Luck!
Which statement is NOT correct?
A An exterior angle of a triangle can equal one of the interior angles of the triangle.
B An exterior angle of a triangle can be acute, right, or obtuse.
C A triangle can have two exterior angles that are obtuse angles.
D A triangle can have two exterior angles that are acute angles.
Answer:
A. An exterior angle of a triangle can equal one of the interior angles of the triangle.
Step-by-step explanation:
The triangle can have more than one exterior angles that can be acute or obtuse angles since the triangles angles must sum to 180 degrees. The exterior angle of a triangle is equal to the sum of the interior angles of the triangle.
helpppppppppp please
Answer:
-2, 4, 6, 8
6, 4, 2 ,0
What are the solutions of this quadratic equation?
X^2 = 16x – 65
Answer:
x= 4.3125
Step-by-step explanation:
Answer:
x=4+7i and x=4-7i
Step-by-step explanation:
Rewrite the given quadratic equation by completing the square.
x^2-8x=-65
x^2-8x+16=-65+16
x^2-8x+16=-49
(x-4)^2=-49
Now, solve the equation by applying the square root property and isolating x.
(x-4)^2=-49
√(x-4)^2 = √-49
x-4=+7i
x=4+7i
So, the solutions to the given quadratic equation are x+4+7i and x=4-7i.
I need help with this one question ASAP
Find the product 0.025 x 7
A. 0.0175
B: 0.175
C. 1.75
D. 17.5
Answer:
b
Step-by-step explanation:
used a calucator
At Southbrook Middle School 42% of the 850 students play only one sport. How many students play only one sport?
Answer:
357
Step-by-step explanation:
Pls mark brainliest :)
16
Chompy has $25 to purchase a fishing pole and some fishing balt. The fishing pole costs $12.50 and the fishing bait costs $0.78 each.
Create an inequality that Chompy could use to find out how much fishing bait he can buy.
The number of fishing bait he can buy will be 16.
What is an expression?Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
Given that Chompy has $25 to purchase a fishing pole and some fishing bait. The fishing pole costs $12.50 and the fishing bait costs $0.78 each.
The expression will be formed as below:-Let the number of fishing bait is x.
12.50 + 0.78x = 25
0.78x = 25 - 12.5
0.78x = 12.5
x = 12.5 / 0.78
x = 16
Therefore, the number of fishing bait he can buy will be 16.
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Solve for v in the proportion.
Answer:
v=30
Step-by-step explanation:
100/90 = 1.1
1.1 times 27 is 30
Answer:
V = 30
Step-by-step explanation:
[tex] \frac{27}{90} = \frac{v}{100} \\ \\ cross \: multiply \: \\ \\ \\ 27 \times 100 = 90 \times v \\ \\ 2700 = 90v \\ \\ 30 = v[/tex]
Express 48 as a product of its primes.
Answer:
2 x 2 x 2 x 2 x 3.
Step-by-step explanation:
The number 48 expressed as a product of its prime factors is 2 x 2 x 2 x 2 x 3.
Answer:
2 x 2 x 2 x 2 x 3.
Step-by-step explanation:
^^^
Write the equation of a line in Slope-Intercept Form that passes through the points
(-8, -12) and (4, -3).
Answer:
y=3/4x-6
Step-by-step explanation:
u have to use the y2-y1/x2-x1 to fid the slope which is 3/4
then use slope intercept form which is y=mx+b to find if the equation has a y-intercept, plug in on point into the slope intercept form -12=3/4(-8)+b and u would get 6.
Question: Two years ago, my age was four times the age of my son, eight years ago my age was ten times the age of my son find the age of my son now This question has already been explained by my friend, but I don't get how she knew she had to get the dad's age in terms of sons age, + 6 to it, and then solve it. Someone please explain
Answer:
My age is 38 years old
My son is 11 years old
Step-by-step explanation:
Represent my current age with x and my son's current age with y
Two years ago;
[tex]x - 2 = 4 * (y - 2)[/tex]
Eight years ago:
[tex]x - 8 = 10 * (y - 8)[/tex]
Simplify both expressions
[tex]x - 2 = 4 * (y - 2)[/tex]
[tex]x - 2 = 4y - 8[/tex]
Add 2 to both sides
[tex]x - 2 +2= 4y - 8 + 2[/tex]
[tex]x = 4y - 6[/tex]
Substitute 4y - 6 in the second equation
[tex]x - 8 = 10 * (y - 8)[/tex]
[tex]4y - 6 - 8 = 10 * (y - 8)[/tex]
[tex]4y - 14 = 10y - 80[/tex]
Collect Like Terms
[tex]4y - 10y = 14 - 80[/tex]
[tex]-6y = -66[/tex]
Divide through by -6
[tex]y = 11[/tex]
Substitute 11 for y in [tex]x = 4y - 6[/tex]
[tex]x = 4 * 11 - 6[/tex]
[tex]x = 44 - 6[/tex]
[tex]x = 38[/tex]
A store orders 22 boxes of light bulbs. Each box has 148 bulbs.
Which is the best estimate of the total number of bulbs the store orders?
A.
20
×
100
B.
20
×
150
C.
25
×
150
D.
25
×
200
Answer:
b
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
can anyone help with this please? 20 points for it
Answer:
9
Step-by-step explanation:
3^2 = 9
how many seconds in 4 minutes? its for PE class-
the answer is 240 seconds :)
give the other person brainliest
Steven and Gina each wrote an expression, but only Steven’s expression is equivalent to 4x - 8. What could be Gina’s expression?
Question options:
2(2x - 8)
2(2x - 4)
-(-4x + 8)
4(x - 2)
2(2x - 8) should be Gina's expression as it is not equivalent to 4x - 8.
What is a linear equation?A linear equation is an algebraic equation of degree one. In general, the variable or the variables(in the case of a linear equation in two variables) the variables are x and y.
Given, Steven and Gina each wrote an expression, but only Steven’s expression is equivalent to 4x - 8.
∴ Gina's expressions should be the one that is not equivalent to 4x - 8.
After observing the given options and applying distributive properties we conclude that 2(2x - 8) is Gina's expression as it is 4x - 16.
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Select which angle is supplementary to angle 1
Answer:
Angle 2
Step-by-step explanation:
Suplementary - 2 angles which equal 180 degrees
Plz help me I’ll give brainliest
Answer:
5/1
Step-by-step explanation:
What is the equation of this line
Answer:
[tex] y = -\frac{4}{3}x + 4 [/tex]
Step-by-step explanation:
Use the slope-intercept form to write the equation if the line of the graph given.
[tex] y = mx + b [/tex], where,
b = y-intercept, which is where the line cuts across the y-axis = 4.
m = slope = [tex] \frac{y_2 - y_1}{x_2 - x_1} = \frac{0 - 4}{3 - 0} = \frac{-4}{3} [/tex]
Substitute m = ⁴/3 and b = 4, into the slope-intercept formula to get the equation of the line:
[tex] y = mx + b [/tex]
[tex] y = -\frac{4}{3}x + 4 [/tex]
identify is this is percent increase or percent decrease, then calculate percentage
Last year the Chess club had 30 members. This year the club has 24 members.
Please help asap
Last year the chess club had 30 members. This year the club has 24 members.
Last year, the chess club had 30 members. This year, the club has 24 members. Since this year had less than last year ( 30 > 24), the percent will be decreasing.
To find the percent decrease, you have to use the following formula.
[tex]\frac{Difference}{Original} \times 100[/tex]
Difference refers to the difference between the two numbers, 24 and 30. The difference between 24 and 30 is 6. Original refers to the original number, which is last year's amount of members in the chess group. Therefore, original = 30.
Substitute the numbers into the formula.
[tex]\frac{Difference}{Original} =\frac{6}{30} =0.2[/tex]
To convert the decimal to a fraction, multiply the decimal by 100.
[tex]0.2 \times 100 = 20 \%[/tex]
The answer is the number of chess members decreased by 20%.
____
Since I started off by identifying whether it was decreasing or increasing, I did the work a bit differently. When finding the difference, you would usually subtract 30 from 24, which results in -6. Above I used 6, but if you used -6, you would end up with a result of -20%, which means it decreased by 20%. They bot end up with the same result, but you don't always have to first identify whether it's decreasing or increasing.
____
Answer:
Decreasing
Step-by-step explanation:
The percentages are decreasing because one year the club had 30 members and the present year has 24 members that decreased by 6!
how many times 92 go in too 100
Answer:
5
Step-by-step explanation:
Answer:
1 time
Step-by-step explanation:
Suppose the manager of a gas station monitors how many bags of ice he sells daily along with recording the highest temperature each day during the summer. The data are plotted with temperature, in degrees Fahrenheit (°F), as the explanatory variable and the number of ice bags sold that day as the response variable. The least squares regression (LSR) line for the data is ????ˆ=−125.30+2.32???? . On one of the observed days, the temperature was 82 °F and 68 bags of ice were sold. Determine the number of bags of ice predicted to be sold by the LSR line, ????ˆ , when the temperature is 82 °F. Enter your answer as a whole number, rounding if necessary.
1 11. What is the constant of proportionality? y = 8x
Answer:
-8
Step-by-step explanation:
lere
4. A toy rocket is fired into the air from the top of a barn. It's height (h) above the ground in
yards after t seconds is given by the function: h(t) =- 5t^2+ 10t+ 20.
a) What was the maximum height of the rocket?
b) How long was the rocket in the air before it reached its highest height?
Answer:
A) 25
Step-by-step explanation:
You use x= -b/2a in order to get your maximum so x= -10/ 2(-5) and you get x=1. You plug 1 into the function as h(1)=-5(1)^2 + 10(1)+ 20 which gets you 25
A function assigns the values. The time it will take for the rocket in the air before it reached its highest height is 1 second.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
A.) The maximum height of the rocket can be found by differentiating the function to get the maximum value of the height funciton.
dh/dt = -5(2t) + 10
Substitute the differentiated value with 0,
0 = -10t + 10
-10t = -10
t = 1
Therefore, the maximum height will be attained when the time is 1 second.
Now, substitute the value of t as 1 second to get the maximum height,
h(t) =- 5t²+ 10t+ 20
h(1) =- 5(1)² + 10(1)+ 20
h(1) = -5 + 10 +20
h = 25 yards
Hence, the maximum height of the rocket is 25 yards.
B.) The time it will take for the rocket in the air before it reached its highest height is 1 second.
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plz help with problem
Answer:
x=8
Step-by-step explanation:
x+x+x=24
3x=24
x=24÷3
x=8
Renee says that y = mx can be rewritten in the form y = mx + b. Is she right? Explain why or why not.
Answer: I did the test i used this and i got it right trust me the answer is below good luck
Step-by-step explanation:
Renee has it right because one of the line passes through the origin the questions remain the same a more extensive version of Y=mx is y=mx +b.
Luca is planning to pay the restaurant bill for his coworkers. The bill was $193.75. A 4% tax was then added by the waiter. If Luca wants to leave a 16% tip on the total amount including the tax, how much should Luca pay?
$201.50
$217.50
$224.75
$233.74? pls help 50 point give good ansewr
Answer:
D; $223.74
Step-by-step explanation:
The amount of bill before tax = $193.75
Percentage of tax added by the waiter = 4%
Amount of tax added by the waiter = (4/100) * 193.75 dollars
= 775/100 dollars
= 7.75 dollars
Total bill after tax = (193.75 + 7.75) dollars
= 201.50 dollars
Percentage of tips that Luca wants to give = 16%
Amount of tips that Luca wants to give = (16/100) * 201.50 dollars
= 32,24 dollars
The total amount that Luca needs to pay = (201.50 + 32.24) dollars
= 233.74 dollars
The answer is D
Hope this helps!
Answer: D
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