Could I get some help on this pls, and most importantly how you could solve it.
Thank you.
Using your choice of technology, find the line of best fit using the data below for the women’s 100-meter Olympic records. Interpret the y-intercept, and explain the significance of the slope.
Answers
The equation of the line of best fit is y = -0.03x + 69.94
How to determine the line of best fit?The column headers are given as:
Year Time(s)
To enter the data values in a graphing calculator, we use the following representations:
x ⇒ Year
y ⇒ Time (s)
Using the above representations, we have the following calculation summary from a graphing calculator:
Sum of X = 72209Sum of Y = 432.95Mean X = 1951.5946Mean Y = 11.7014Sum of squares (SSX) = 17242.9189Sum of products (SP) = -514.5997The equation of the line of best fit is:
y = bx + a
Where
b = SP/SSX = -514.6/17242.92 = -0.02984 ≈ -0.03
a = MY - bMX = 11.7 - (-0.03*1951.59) = 69.94497 ≈ 69.94
So, we have:
y = -0.03x + 69.94
A linear equation is represented as:
y = Slope * x + y intercept
So, we have:
Slope = -0.03
y intercept = 69.94
The y-intercept implies that the initial time is 69.94 seconds, while the slope implies that the time decreases by 0.03 seconds each year
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Related Questions
Write the equation of the circle graphed below.
Answers
Step-by-step explanation:
eq of a circle is
(x-h)^2+(y-k)^2=r^2
h is 0
k=3
r is 1.5 this is radius of the circle
x^2+(y-3)^2=1.5^2
Which point is on the graph of the inverse function h-¹(x)?
O (2,4)
0 (0)
O (0, 1)
O (-5, 1)
Answers
Answer: (0,1)
Step-by-step explanation:
If (x,y) lies on the graph of the original function, then (y,x) lies on the graph of the inverse.
Since (1,0) lies on the graph of h(x), (0,1) lies on the graph of its inverse.
(0, 1) point is on the graph of the inverse function h-¹(x).
What are inverse functions?Two functions f(x) and g(x) are inverses if their composition is equal to the identity.
Equation of line will be
y = -2x + 2 = h(x)
h⁻¹(x) will be calculated as:
x = -2y + 2
x - 2 = -2y
y = (2 - x)/2
So, y = h⁻¹(x) = (2 - x)/2
put x = 0 in the equation y = (2 - x)/2
y = 1
(0, 1) = (0, 1)
This, (0, 1) is the point on h⁻¹(x).
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Suppose y varies inversely as x², and y = 64 when x = 1/4. Find y when x = 7.
Answers
Finding the proportionality constant :
y = k/x²64 = k/(1/4)²k = 4Finding y when x = 7 :
y = 4/(7)²y = 4/49The value of y is 4/49 when x = 7.
[tex]y = \frac{k}{ {x}^{2} } \\ \\ 64 = \frac{k}{ { (\frac{1}{4}) }^{2} } \\ \\ 64 = \frac{k}{ \frac{1}{16} } \\ \\ 64 = 16k \\ \\ k = \frac{64}{16} \\ \\ k = 4.[/tex]
Finding 'y'
[tex]y = \frac{4}{ {7}^{2} } \\ \\ y = \frac{4}{49} .[/tex]
Please solve it. It will help me for my exam preparation.
Answers
[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]
[tex]\qquad \tt \rightarrow \: \cfrac{ y{ }^{2} }{(p - y) {}^{y} }[/tex]
____________________________________
[tex] \large \tt Solution \: : [/tex]
[tex]\qquad \tt \rightarrow \: \cfrac{ {p}^{2} }{(p - y) {}^{y} } + \cfrac{ - 2p}{(p - y) {}^{y - 1} } + \cfrac{1}{(p - y) {}^{y - 2} } [/tex]
[tex]\qquad \tt \rightarrow \: \cfrac{ {p}^{2} + ( - 2p)(p - y) + 1(p - y) { }^{2} }{(p - y) {}^{y} } [/tex]
[tex]\qquad \tt \rightarrow \: \cfrac{ {p}^{2}- 2p {}^{2} + 2py + p {}^{2} + y{ }^{2} - 2py}{(p - y) {}^{y} } [/tex]
[tex]\qquad \tt \rightarrow \: \cfrac{ {p}^{2} + {p}^{2} - 2p {}^{2} + 2py - 2py + y{ }^{2} }{(p - y) {}^{y} }[/tex]
[tex]\qquad \tt \rightarrow \: \cfrac{ y{ }^{2} }{(p - y) {}^{y} }[/tex]
Answered by : ❝ AǫᴜᴀWɪᴢ ❞
What is the 17th term in the arithmetic sequence an=77+(n-1)(-5)
Answers
Answer:
a₁₇ = - 3
Step-by-step explanation:
substitute n = 17 into the nth term rule
a₁₇ = 77 + 16 × - 5 = 77 - 80 = - 3
Step-by-Step Explanation:
=> an = 77 + (n - 1)(-5)
Therefore,
=> a = 77
=> d = -5
=> n = 17
Substitute Values in the Formula :-
an = a + (n - 1)(d)
an = 77 + (n - 1)(-5)
a17 = 77 + (17 - 1)(-5)
a17 = 77 + 16(-5)
a17 = 77 - 80
=> a17 = -3
Hence, the 17th Term of the A.P is -3
Which of these are factors of this polynomial?
-3x3 + 15x2 + 3x - 15
0 (x + 1)
3x
(3x - 1)
(x - 5)
-3
(x + 5)
(x - 1)
0
0
Answers
Explanation: -3x^3 + 15x+3x -15
Factor by grouping: -3x^2(x-5) +3(x-5)
Combine: (-3x^2 +3)(x-5)
Factor by GCF: -3(x^2 +1)(x-5)
Set equal to zero: (x^2 +1)=0
(x+5)=0
Solve: x=5, x=square root of 1
HELP !!!
A taxi driver uses this formula to work out the price of a journey, in pounds. price of journey = 3 + 2 x distance in miles. Leah has £5, the journey to her home is 2.5 miles. She asks the taxi driver to take her as near to home as possible. How far will she need to walk to arrive home?
Answers
The distance Leah would have to walk home is 1.5 miles
Calculating distanceFrom the question, we are to determine the distance Leah will have to walk home
From the given information,
Price of journey in pounds = 3 + 2 × distance in miles
Let the distance be d
Then,
Price of journey in pounds = 3 + 2d
Since Leah has £5, we can write that
5 = 3 + 2d
5 - 3 = 2d
2 = 2d
∴ d = 2/2
d = 1 mile
This means her money can only cover 1 mile
But the journey to her home is 2.5 miles
Therefore, she will have to walk
2.5 mile - 1 mile = 1.5 miles
Hence, the distance Leah would have to walk home is 1.5 miles
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0.33632287 to 3sf please
Answers
Answer:
.
Step-by-step explanation:
Antonio and his two brothers equally shared the cost of a new CD with a list price of $18. They
received a 20% discount off the list price and paid 8.25% sales tax on the discounted price.
Find the approximate amount that each of the 3 brothers paid toward the cost of the CD.
A. $4.80
B. $5.20
C. $6.50
D. $15.59
Answers
Answer:
B. $5.20
Step-by-step explanation:
18 decrease 20% =
18 × (1 - 20%) = 18 × (1 - 0.2) = 14.4
14.4 increase 8.25% =
14.4 × (1 + 8.25%) = 14.4 × (1 + 0.0825) = 15.588
15.588/3 = 5.196
Enter the correct answer in the box.
Consider this expression.
x² + x - 72
Replace the values of a and b to rewrite the given expression.
(x+ a)(x+b)
Answers
(x + 9)(x - 8), where a = 9 and b = -8 or a = -8 and b = 9
The correct values of a and b to rewrite the expression as (x + a)(x + b) are:
a = 9
b = -8
So, (x + 9)(x - 8) is the correct form of the given expression.
Here, we have to rewrite the expression x² + x - 72 in the form (x + a)(x + b), we need to find two numbers a and b such that when multiplied,
it give us the constant term -72 and when added, it give us the coefficient of the x term, which is 1.
The expression x² + x - 72 can be factored as follows:
x² + x - 72
= x² + 9x - 8x - 72
=x(x+9) -8(x+9)
= (x + 9)(x - 8)
Therefore, the correct values of a and b to rewrite the expression as (x + a)(x + b) are:
a = 9
b = -8
So, (x + 9)(x - 8) is the correct form of the given expression.
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Given the function, f(x)=√x-2 +3, choose the correct transformation.
right 2, up 3
Right2, down 3
left 2, up 3
left 2, down 3
Answers
A coordinate plane is labeled street on the x-axis and avenue on the y-axis. ping is at point (3, 6) and ari is at point (21, 18). a line is drawn from ping to ari. ping lives at the corner of 3rd street and 6th avenue. ari lives at the corner of 21st street and 18th avenue. there is a gym two-thirds the distance from ping's home to ari's home. x = (startfraction m over m n endfraction) (x 2 minus x 1) x 1 y = (startfraction m over m n endfraction) (y 2 minus y 1) y 1 where is the gym? 9th street and 10th avenue 12th street and 12th avenue 14th street and 12th avenue 15th street and 14th avenue
Answers
The gym location is (15th street, 14th Avenue). so the option D is correct.
What is graph ?A graph contains data of which input maps to which output.
Analysis of this leads to the relations which were used to make it.
Given :
Ping's residence = (3rd street, 6th Avenue)
Ari's residence = (21st street, 18th Avenue)
Gym location is 2/3 the distance of Ping's residence to Ari's residence
So, distance between Ping's home to Ari's home will be
Distance = (21st street, 18th Avenue) - (3rd street, 6th Avenue)
Distance = (21 - 3) street, (18 - 6) avenue
Distance between ping and Ari will be
= (18th , 12th )
We know that
Gym distance = 2/3 × (18), 2/3 ×(12)
Gym distance = (12, 8)
Gym location = Ping's location + gym distance
Gym location = (3rd street, 6th Avenue) + (12th street, 8th Avenue)
Gym location = (15th street, 14th Avenue)
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I really could use help with this
Answers
Answer:
B. [tex]\mathsf {\frac{1}{13}(26x-169)=\frac{1}{12}(-156+24x) }[/tex]
Step-by-step explanation:
[tex]\mathsf {\frac{1}{13}(26x-169)=\frac{1}{12}(-156+24x) }[/tex]
2x - 13 = -13 + 2x
2x - 13 = 2x - 13
As both sides are equal, any value can be substituted for x, and hence it has infinitely many solutions.
Answer:
B. 1/13(26x - 169) = 1/12(-156 + 24x)
Step-by-step explanation:
When looking for an equation with infinetly many solutions, we are looking for an equation that is true when simplified
such as: 3c = 3c
or x - 10 = - 10 + x
this is because any value that we put in for x will simplify to a true equation (will be a solution)
so, let's examine the options:
A. if we combine like-terms on both sides, we will end up with 23 + 32x = 32x + 26
which is false, for any value that we put in for x
B. this statement is true--regardless of the value for x.
1/13 · 26 is the same as 1/12 · 24 (both equal 2; so both sides would distribute to 2x)
1/13th of -169 is -13; and 1/12th of -156 is -13
so, for all values of x, option B is true
(all values of x are a solution; and "x" could be any value)
C. by distributing the 2 (6 - 4x = -5x + 7), we find an equation that is not true for all values of x [we don't even have to find the solution, we just know that there will only be a/a few solution ]
D) because the variable, x, is only on one side (and when distributed, is not cancelled by any other x), we know that it cannot be true for infinetly many solutions
(the only true solution will be when the equation is simplified to 4/18 = 4/18)
hope this helps!!
11. Work backwards to write a quadratic equation that will have solutions of x = 12 and x = 2.
Answers
-------------------------------------------------------------------------------------------------------------
Answer: [tex]\textsf{x}^2\textsf{ - 14x + 24}[/tex]
-------------------------------------------------------------------------------------------------------------
Given: [tex]\textsf{x = 12 and x = 2}[/tex]
Find: [tex]\textsf{Determine the quadratic equation}[/tex]
Solution: In order to determine the quadratic equation we need to move the integers onto the side where x is and then distribute.
Move the integers
Solution #1[tex]\textsf{x - 12 = 12 - 12}[/tex][tex]\textsf{x - 12 = 0}[/tex]Solution #2[tex]\textsf{x - 2 = 2 - 2}[/tex][tex]\textsf{x - 2 = 0}[/tex]Create and expression and distribute
[tex]\textsf{(x - 12)(x - 2) = 0}[/tex][tex]\textsf{(x * x) + (x * -2) + (-12 * x) + (-12 * -2) = 0}[/tex][tex]\textsf{x}^2\textsf{ - 2x - 12x + 24 = 0}[/tex][tex]\textsf{x}^2\textsf{ - 14x + 24 = 0}[/tex]Therefore, after completing the steps we were able to determine that the quadratic equation that will have solutions of x = 12 and x = 2 is x^2 - 14x + 24.
Passengers under the age of 8 and whose height is less than 57 inches must be in the _________ seat of a vehicle.
Answers
Passengers under the age of 8 and whose height is less than 57 inches must be in the back seat of a vehicle.
When you journey in the backseat of a automobile, you take a seat within the row of seats behind the motive force. Kids once in a while combat over the front seat, not wanting to take a seat within the backseat. you may tour within the backseat of a car except you're the driver or are using a two-seat sports activities vehicle.
The cushion in which the driving force or passenger sits is either known as a horizontal cushion or seat cushion. The back of the automobile seat is called the seat again however it could additionally be called a backrest.
An infant protection seat every so often referred to as an toddler protection seat, infant restraint device, baby seat, child seat, car seat, or booster seat is a seat designed particularly to shield youngsters from injury or death throughout automobile collisions.
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Define the hypothesis and the conclusion of the following conditional statement.
Conditional Statement: All kids who wear braces will have straight teeth.
Answers
The hypothesis will be that "If a kid wears braces, then the kid will have a straight teeth".
What is hypothesis?It should be noted that a hypothesis means a proposed explanation based on reasoning and evidence.
In this case, the hypothesis will be that "If a kid wears braces, then the kid will have a straight teeth".
The conclusion is that kids who wear braces will have straight teeth.
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Which numbers are the extremes of the proportion shown below?
3-604
=
8
A. 3 and 8
B. 3 and 6
C. 4 and 6
D. 4 and 8
Answers
Answer:
A 3 and 8
Step-by-step explanation:
if a/b=c/d, the extremes are "a" and "d". The means would then be "b" and "c"
The extremes of the proportion are 3 and 8.
To find the extremes of a proportion, we need to identify the numbers that are positioned at the far ends of the proportion. In the given proportion:
3/4 = 6/8
The numerator of the first fraction, 3, and the denominator of the second fraction, 8, are the extremes. These numbers form the far ends of the proportion.
Therefore, the extremes of the proportion are 3 and 8.
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Find the distance between the point (3, 5) and a line with the equation 5 x - 3 y + 10 = 0
Answers
The distance between the point (3, 5) and a line with the equation 5x – 3y + 10 = 0 will be 10 / √(34) units.
What is the distance between a point and a line?Let (x₁, y₁) be the point and ax + by + c = 0 be the line.
Then the distance between a point and a line will be
[tex]\rm d = \dfrac{|ax_1 + by_1 + c|}{\sqrt{a^2 + b^2}}[/tex]
The point (3, 5) and a line with the equation 5x – 3y + 10 = 0.
Then the distance between them will be
[tex]\rm d = \dfrac{|5 *3 - 3 *5 + 10|}{\sqrt{5^2 + (-3)^2}}\\d = \dfrac{10 }{\sqrt{34}} \ units[/tex]
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Margret divides a packet of 20 biscuits among her 8 friends. Find the number of biscuits each friend gets. Express the answer as a rational number
Answers
The number of biscuits each friend can get would be 2.5.
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Margret divides a packet of 20 biscuits among her 8 friends.
In order to find the number of biscuits each friend gets.
20 / 8
= 2.5
Hence, the number of biscuits each friend can get would be 2.5.
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PLS HELP!!
Find the zeros of y=x² - 6x-4 by completing the square.
O A. x= 3± √13
OB. x = 3± √5
O C. x = -3± √13
OD. x = ±3
Answers
Answer:
A
Step-by-step explanation:
y = x² - 6x - 4
(x - 3)² - 3² - 4 = 0
(x - 3)² - 13 = 0
(x - 3)² = 13
x - 3 = ±√13
x = 3 ± √13
If a = 6, then the value of b is...
Answers
Answer:
6/- 3
Step-by-step explanation:
A dog sits at a corner of a square with side length 44 meters. the dog runs 10 meters along a diagonal toward the opposite corner. it stops, makes a 90 degrees right turn and runs 5 more meters. a scientist measures the shortest distance between the dog and each side of the square. what is the average of these four distances in meters?
Answers
Refer to the figure given below while reading the solution.
Suppose the dog reaches position A when traveled 10 m diagonally towards the opposite side.
And then position B when traveled 5 m towards the right turning 90°.
We can observe that APC is a right triangle with legs of equal length AC. And the coordinates of the point A is (AC, AC).
Also we can observe that APB is a right triangle with legs of equal length AD. Then the coordinates of the point D is (AC, AC-AD).
Hence, the coordinates of B will be (AC+AD, AC-AD).
Now, we since we have the coordinates we can calculate the shortest distances of B from each of the sides.
The shortest distance of B from PQ = AC-ADThe shortest distance of B from SR = 44-(AC-AD)The shortest distance of B from SP = AC+ADThe shortest distance of B from RQ = 44-(AC+AD)So, the average of the shortest distances of B from each side is [tex]\frac{(AC-AD)+44-(AC-AD)+(AC+AD)+44-(AC+AD)}{4}=\frac{44+44}{4}=22[/tex]
Hence, the average of the shortest distance of B from each side is 22 m
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Claire and jane did an examination together. jane scored 9 more marks than claire and her marks were 60% of the sum of their scores. what are the scores of each student?
Answers
The score of Jane is 27 and the score of Claire is 18.
A linear equation is an equation where highest degree of variables is 1.
Let the score of Jane's mark is x
Given, that score Jane is 9 more than the score of Claire.
So, the score of Claire= x-9
Given, the score of Jane is 60% of the sum of their scores.
the sum of their scores is = x+x-9= 2x-9
from the above it is clear that
the linear equation will be
x=60%(2x-9)
⇒x=0.6(2x-9)
⇒x= 1.2x -5.4
⇒1.2x-x= 5.4
⇒0.2x= 5.4
⇒x= 5.4/0.2
⇒x= 27
So the score of Jane is 27.
As score Jane is 9 more than the score of Claire.
the score of Claire is = x-9= 27-9=18
Therefore the score of Jane is 27 and the score of Claire is 18.
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Find the relationship between zeros and intercepts of the polynomial m2 + 5m + 4.
They are equal to zero
They are same
They are different
They are opposites
Answers
The zeros and intercepts of the polynomial m^2 + 5m + 4 will be different.
Intercepts and zero of a functionA quadratic function is a function that has a degree of 2.
Given the following equation
f(m) = m^2 + 5m + 4
The x-intercept occurs at the point where f(m) is zero and same is applicable to the zeros of the function.
This shows that the zeros and intercepts of the polynomial m^2 + 5m + 4 will be different.
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Planes X and Y and points J, K, L, M, and N are
shown.
X
L
K
M
Y
Exactly how many planes contain points J, K, and N?
0000
O
1
O2
3
Answers
0 planes contain points J, K, and N.
Given that, planes X and Y and points J, K, L, M and N.
We need to find exactly how many planes contain points J, K, and N.
From the figure, we can see Point J doesn't belong to the planes X and Y and Point K and N belong to the plane X.
Since, points J, K, and N together do not belongs to any single plane, the planes contain points J, K, and N is 0.
Therefore, 0 planes contain points J, K, and N.
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Answer:
2 planes.
Step-by-step explanation:
The third option is correct.
Find the missing term.
(x12)5 x (x-2)⁹ X ____=
(140)5
Answers
Answer:
x12×x5x×x-2×9) ____=((140)5
60x × (x-18)x _______=(140)5
60x×x-10x _______=(140)5
60x-18x______=140×5
42x_______=700
42x-42x ____=700-42x
658x
What is the solution to the equation 5x + 2(x-4)= 5x + x -10?
03
02
0-2
0-3
Answers
Answer:
5x+2x(x-4)=5x+x-10
5x+2x-8=5x+x-10
5x-5x+2x+x=-10+8
x+3x=-2
4x=-2
x=-2
What is the slope of the line segment?
Answers
Answer:
A
Step-by-step explanation:
Givens
y2 = 15
y1 = 0
x2 = 3
x1 = 0
Equation
slope = (y2 - y1) / (x2 - x1)
Solution
The question is a bit unfair. It looks like you should be answering one. It's not true. What makes it not so is that the axis (x and y) have different intervals.
Substitute the givens into the equation
slope = (15 - 0) / (3 - 0)
slope = 15 / 3
slope = 5
Answer Slope = 5 or A
Answer:
it's A
Step-by-step explanation:
that's what i put on that question
The first three steps in writing f(x) = 40x + 5x2 in vertex form are shown.
Write the function in standard form.
f(x) = 5x2 + 40x
Factor a out of the first two terms.
1(x) = 5(x2 + 8x)
Form a perfect square trinomial.
(%) =16
1(x) = 5(x2 + 8x + 16) -5(16)
What is the function written in vertex form?
® f(x) = 5(x + 4) -80
® f(x) = 5(x + 8) - 80
O f(x) = 5(x + 4)2 - 80
• f(x) = 5(x + 8) - 80
Answers
Answer: Choice C [tex]f(x) = 5(x+4)^2 - 80[/tex]
======================================================
Reason:
The expression [tex]x^2+8x+16[/tex] factors to [tex](x+4)^2[/tex] using the perfect square trinomial formula [tex](a+b)^2 = a^2 + 2ab + b^2[/tex]. In this case, a = x and b = 4.
The -5(16) simplifies to -80
Therefore, [tex]5(x^2+8x+16) - 5(16)[/tex] turns into [tex]5(x+4)^2 - 80[/tex]
Compare this to [tex]a(x-h)^2 + k[/tex] to see that h = -4 and k = -80. The vertex is located at (h,k) = (-4, -80)
Answer:
c) 5(x+4)² - 80
Step-by-step explanation:
You have already gotten the third (second-last) step for finding the vertex as follows:
f(x) = 5(x² + 8x + 16) -5(16)
= 5(x+4)² - 80
Additional remarks: to find the vertex, you can just use find the value of x when x+4 = 0, meaning x = -4 and y = -80. Hence, the vertex is (-4, -80).
Hope this helps and feel free to mark this as brainliest! :)
HEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELP
Answers
Answer:
C.
Step-by-step explanation:
Adding 2 fractions results in a fraction.
Answer:
B: The sum is a non-terminating and a non-reapeating decimal
Step-by-step explanation:
-11/4 +5/g
There is 15 steps you have to do after (look in the picture)
but this is what you get:
[tex]-\frac{11g-20}{4g}[/tex]
