Jocelyn is training for a race by running several miles each day. she tracks her progress by recording her average speed in minutes per mile for each day since she started training. based on the information given, what could jocelyn expect to have for her average speed on the 9th day?

Answers

Answer 1

Finding the regression equation, her average speed on the 9th day should be expected to be of 6.92 minutes per mile.

How to find the equation of linear regression using a calculator?

To find the equation, we need to insert the points (x,y) in the calculator.

Researching the problem on the internet, the values of x and y are given as follows:

Values of x: 1, 2, 3, 4, 5, 6.Values of y: 8.2, 8.1, 7.5, 7.8, 7.4, 7.5.

Hence, using a calculator, the equation for the average minutes per mile after t days is given by:

V(t) = -0.15143t + 8.28

Hence, for the 9th day, t = 9, hence the estimate is:

V(9) = -0.15143(9) + 8.28 = 6.92 minutes per mile.

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Related Questions

Mr. Ramirez purchased 20 concert tickets for a total of $225. The concert tickets cost $15 for adults and $10 for children under the age of 12.

(AKS 16) What does the solution to the system of equations represent in the context of the problem? Explain.

Answers

Answer:

See below

Step-by-step explanation:

The solution will show the NUMBER Of adult and the NUMBER of child tickets purchased .

a = adult tickets         cost = 15 a

c = children's tickets    <=== this is equal to 20 - a    

                  cost for children's tickets equals   10(20 - a)

15 a + 10c   =   225           rememeber c = 20 -a <===put that in

15 a      + 10 ( 20 -a)   = 225    solve for a

15a + 200 - 10 a = 225

5 a = 25

a = 5   tix                 then     c = 20 - a =  15   tix

PLSS HELP ITS ANGLESSS

Answers

D. 66 because all the angles of a triangle combine to form 180 degrees, you can find the missing angle by subtracting the other angles. 180-43-71= 66 degrees

Answer: D. 66°

Step-by-step explanation:

A triangle has 180° and we already have the numbers for two sides. We must find the answer that adds up to 180°.

A. 43° + 71° + 19°= 133°

B. 43° + 71° + 77°= 191°

C. 43° + 71°+ 114= 228°

D. 43° + 71° + 66°= 180°

With this information, we know that the answer is D. 66°.

I hope this helps! Pls give brainliest :)

Solve for B:

1/5b=d+f

Answers

Answer:

b=5d+5f

solve for b by simplifying both sides and then isolating the variable.

376

Step-by-step explanation:

What is the length of the hypotenuse? If necessary, round to the nearest tenth.

Answers

Greeting to you! My name is Cecille and I’m here to answer that question

For more explanation, please see the attachment

what is the length of EF if DE=17 and DF=13 in DEF

Answers

By the fact that the sum of internal angles in a triangle and the law of the cosines, the possible lengths of the side EF are represented by 16 ≤ EF ≤ 900.

How to determine the possible lengths of a missing side in a triangle

In this question we have a triangle with two known lengths and there many possible solutions for the length of the segment EF. By geometry we know that the sum of the internal angles in a triangle equals 180° and by the law of cosines we have the following expression for the missing length:

EF² = 17² + 13² - 2 · (13) · (17) · cos D

EF² = 458 - 442 · cos D, 0 ≤ θ ≤ 180°

As the cosine is a function bounded between - 1 and 1, then the possible lengths of the side EF are:

16 ≤ EF ≤ 900

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Which expressions are equivalent to 8(-10x+3.5y-7)? Select two options.
A. -80x + 24.5y - 56
B. -80x + 28y - 56
C. 80x + 28y + 56
D. 4 (-20x + 7y - 14)
E. -4 (-20x + 7y - 14)

Answers

Answer:

B, D

Explanation:

8(-10x+3.5y-7)

= -80x + 28y - 56

4 (-20x + 7y - 14)

= 8(-10x+3.5y-7)

= -80x + 28y - 56

Answer:

B) -80x + 28y - 56

D) 4 (-20x + 7y - 14)

Original Expression:

⇒ 8(-10x+3.5y-7)

⇒ -80x + 28y - 56

Now confirmed that option B is correct when the expression is simplified which makes option A and C not applicable.

For option D:

⇒ 4 (-20x + 7y - 14)

⇒ -80x + 28y - 56

Option E is not correct as:

⇒ -4 (-20x + 7y - 14)

⇒ 80x - 28y + 56

PLS HELP FAST!! WILL GIVE BRAINLEIST!
Examine the intersection of these two lines: In photo
Which of the following pairs of angles are
supplementary? Select all that apply.
1 and 2
1 and 3
1 and 4
2 and 3
2 and 4
3 and 4

Answers

Answer:

1 & 3

1 & 4

2 & 3

2 & 4

Step-by-step explanation:

Any angles that are next to each other on a straight line will add to 180. If they are across from each other (like 1 & 2 or 3 & 4) those are vertical angles. They are equal.

I think it is 1&3 1&4 2&3 2&4

The first two terms of an arithmetic sequence are shown below. 1 2 x+2' x+3' ck to task your mistake. Find the third term of this sequence. Give your answer fully factorised. Watch video Answer > The first two terms of an arithmetic sequence are shown below . 1 2 x + 2 ' x + 3 ' ck to task your mistake . Find the third term of this sequence . Give your answer fully factorised . Watch video Answer >​

Answers

Answer:

in picture

Step-by-step explanation:

added in the picture

If R = {(x, y): y = x = 2, 4, 6}, find the range of R. , 4 , 6 } , find the range of R.

Answers

4,6 is the answer cause um a smart

The work of a student to solve the equation 4(2x − 4) = 8 + 2x + 8 is shown below: Step 1: 4(2x − 4) = 8 + 2x + 8 Step 2: 6x − 8 = 16 + 2x Step 3: 6x − 2x = 16 + 8 Step 4: 4x = 24 Step 5: x = 6 In which step did the student first make an error and what is the correct step? (5 points) Step 2; 8x − 4 = 2(6 + x + 6) Step 2; 8x − 16 = 16 + 2x Step 3; 6x − 2x = 16 − 8 Step 3; 6x + 2x = 16 + 8

Answers

He made his mistake on step 2
Correct next step is 8x-16=16+2x
Add 16 on both sides
You get 8x=32+2x
Then subtract 2x on both sides
You get 6x=32
Divide by 6 on both sides
Left with x=5.3 repeated or 16/3

A plant was 8 in. tall last week, and grew x in. this week. 1. Which expression represents how tall, in inches, the plant is now? A. x + 8 B. 8x Explain your thinking. 2. For the expression not chosen, describe a scenario the expression might represent.

Answers

Answer:

Step-by-step explanation:

Solution

Total growth (2 weeks) = x + 8

Explanation

During the second week, the plant is already 8 inches tall. It adds x to its total growth. 8x is not the same thing.

Meaning of 8x

For plants, 8x could mean the amount of growth that took place in 8 weeks. x is the amount of growth that takes place in 1 week. You have to think that the growth (x)  for each week is the same

If pound of cheese costs $3.43, what is the cost per pound?
PLS HELP

Answers

Answer:

$3.43

Step-by-step explanation:

Cost per pound means how much you are paying for one pound of the item. In this question it says a pound of cheese costs 3.43, therefore each pound of cheese costs 3.43. We can also use the equation 3.43x where x represents the amount of pounds you are purchasing. Just multiply the two and you will get a cost for any amount (pounds) of cheese.

a pound of cheese cost $3.43.

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 = 4

Finding y when x = 7 :

y = 4/(7)²y =  4/49

The 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]

Simplify. Rewrite the expression in the form 9^n9
n
9, start superscript, n, end superscript.
(9^{-3})(9^{12})=(9
−3
)(9
12
)

Answers

[tex] {3}^{18n} [/tex]

Answer:

9^10

Step-by-step explanation:

khan

can someone pleasee

Answers

i honestly don’t know but I need points
I don't know the answer

If function g has the factors (x − 7) and (x 6), what are the zeros of function g?

Answers

The second one isn’t a factor… if you meant (x+6) then the two zeros are 7 and -6

Show work, can someone help me out having trouble with this problem

Answers

Answer:

Step-by-step explanation:

Formula

a = 9 / (f - 7)

Note

If you are going to try and isolate f, you must take the 7 with it, assuming that getting f to the left hand side will the your first step. It will be mine.

Solution

a = 9 / (f - 7)                     Multiply both sides by (f - 7) leave the brackets around (f - 7)

a(f - 7) = 9(f - 7)/(f - 7)      Combine

a(f  -  7) = 9                       Remove the brackets

fa - 7a  = 9                        Add 63 to both sides

fa - 7a + 7a = 9 + 7a         Combine

fa = 9 + 7a                        Divide by a

fa/a = (9 + 7a)/a                Simplify

f = (9 + 7a)/a

Answer

f = (9 + 7a)/a

find the surface area of the pyramid

Answers

Answer:

145

Step-by-step explanation:

mutiply each 6 and 7 twice and add 7x7 from the bottom

which of these tables represents a function

Answers

Answer:

A: Table W.

Step-by-step explanation:

A function for tables are where the X-input NEVER repeat.

Graph W. Doesn't have any repeating inputs on the x side

Y can repeat as much as the problem make wants but the x CAN NOT.

Part b how do these functions differ from functions you have used in algebra in the past?

Answers

The functions differ from functions that I have used in algebra in the past as the functions can be combined and are more about rotation rather than where they move.

What is a function?

It should be noted that a function simply means an equation where the x that is plugged into the equation will yield exactly on e y from the equation.

In this case, the functions differ from functions that I have used in algebra in the past as the functions can be combined and are more about rotation rather than where they move.

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2. analyze the data you gathered about the number of births in the united states in 2011.
a. what do you observe about michigan and florida? justify your conclusion by using the cartogram. (5points)
b. there were 4,008,000 births in the united states during 2011. what proportion of all national births are accounted for by michigan? what proportion of all national births are accounted for by florida? (5 points)
c. suppose a person born during 2011 in the united states is chosen randomly. is the person more likely to have been born in florida or michigan? explain. (5 points)
d. the population of the united states was 308,745,538 in 2011. there were 18,801,310 people in florida and 9,883,640 people in michigan. compute the probability that a randomly selected us resident in 2011 was living in florida. do the same for michigan. which is greater? (5 points)
e. the number of births in a region depends mostly on population size. there are also random fluctuations and regional differences. consider your answers about populations and birth rates. are your answers consistent with this fact? (5 points)

Answers

The figures show that the number of births for Florida and Michigan reduced

How to compute the probability?

From the data sourced, the number of births in Florida in 2010 was 214519 while in 2011, it was 213237. For Michigan, there was decrease from 114717 to 114159.

When a person born during 2011 in the United States is chosen randomly, the person is more likely to have been born in Florida.

The probability that a randomly selected us resident in 2011 was living in Florida will be:

= 18,801,310/308,745,538

= 0.061

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Which statements about the arcs and angles are true? select three options. ∠efd ≅ ∠egd ∠egd ≅ ∠ecd arc e d is-congruent-to arc f d marc e f = 60° marc f d = 120°

Answers

The true statements about the arcs and angles in circle C are:

∠EFD ≅ ∠EGD.Arc ED ≅ arc FD.m arc FD = 120°.

How to analyze the arcs and angles?

In Geometry, the sum of the measures of the interior angles in a quadrilateral is equal to 360°. Thus, we have:

m∠G + m∠GDC + m∠DCE + m∠GEC = 360°

60 + 90 + m∠DCE + 90 = 360

240 + m∠DCE = 360

m∠DCE = 360 - 240

m∠DCE = 120°.

Since ∠DFE is an inscribed angle that is subtended by arc DE, we have:

m∠DFE =  m∠DCE

m∠DFE =  120

m∠DFE = 1/2 × 120

m∠DFE = 60°.

Therefore, ∠EFD ≅ ∠EGD.

From circle C, we can deduce that side ED is subtended by arc ED and side FD is subtended by arc FD (side ED ≅ side FD). Thus, arc ED ≅ arc FD and m arc FD is equal to 120°.

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Answer:

A C E

took quiz

What ordered pair is a solution of the equation?

y=-2x-5

Answers

[tex] \sf \underline{Answer:}

[/tex]

Pick any value for x, like x = 0, plug it into the equation, and get the value for y. For x = 0,

2(0) + y = 5

y = 5

The ordered pair is (0,5). Find other ordered pairs using the same reasoning.

[tex]2(0) + y = 5[/tex]

[tex]y = 5[/tex]

The ordered pair is (0,5).

each day you read 15 pages in your textbook. use the drop-down menu to choose the correct equation that represents the total number of pages you have read after any number of days.

Answers

Answer:

15x

Step-by-step explanation:

assum 1 day you read 15 pages then after X day you reads 15*X=15X

A six-sided die is thrown three times. What is the probability of getting a prime number on all three rolls?​

Answers

Answer:

3/216

Step-by-step explanation:

The sample space for this experiment is 6^3 which is 216

there are three prime numbers on  die

namely 2 , 3 and 5

so the probability of getting a prime number on all three roles would be

(3/6)^3

if y= 2f(g(x)), then d^2y/dx^2=​

Answers

Use the chain rule to differentiate both sides of the given equation with respect to [tex]x[/tex] :

[tex]y = 2 f(g(x))[/tex]

[tex]\dfrac{dy}{dx} = y' = 2 f'(g(x)) g'(x)[/tex]

Differentiate again with the product and chain rules to get the second derivative :

[tex]\dfrac{d^2y}{dx^2} = y'' = \boxed{2 f'(g(x)) g''(x) + 2 f''(g(x)) g'(x)^2}[/tex]

(D)

Which property allows you to write the expression (3 7i) (8 − 6i) as (8 − 6i) (3 7i)?

Answers

Answer:

Commutative property

can someone please help meee

Answers

Step-by-step explanation:

Well the first 3 you just plug in the value of x which results in.

a. f(0) = 7(0)^2 + 3(0) - 2

   f(0) = -2

b. f(2) = 7(2)^2 + 3(2) - 2

   f(2) = 7(4) + 6 - 2

   f(2) = 28 + 4

   f(2) = 32

c. f(-2) = 7(-2)^2 + 3(-2) - 2

   f(-2) = 7(4) - 6 - 2

   f(-2) = 28 - 8

   f(-2) = 20

for the last ones it's essentially the same thing except the value a is not known

d. f(a+1) = 7(a+1)^2 + 3(a+1) - 2

   f(a+1) = 7(a^2 + 2a + 1) + 3a + 3 - 2

   f(a+1) = 7a^2 +14a + 7 + 3a + 1

   f(a+1) = 7a^2 + 17a + 8

c. f(-a) = 7(-a)^2 + 3(a) - 2

   f(-a) = 7a^2 + 3a - 2

10 point to Help with this ?

Answers

All the transformations for which A and B would be congruent are; Translation, Reflection, and Rotation.

What is congruence transformation?

A congruence transformation is defined as a movement of shape such that it can produce a shape that is congruent to the original.

There are three types of congruence transformation;

1. Translation

2. Reflection

3. Rotation

Given;

Shape B is made by applying a single transformation to shape A.

Hence, All the transformations for which A and B would be congruent are; Translation, Reflection, and Rotation.

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identify if each function is a polynomial function. justify your answer.

Answers

Functions which are polynomials are y=[tex]5x^{4} +x^{2} -8[/tex] ,y=[tex]7x^{3}[/tex] and y=[tex]6^{x}[/tex]

Given Functions : 1) y=[tex]-x^{2} +1/1-2x[/tex] 2)y=[tex]5x^{4} +x^{2} -8[/tex]. 3) y=[tex]7x^{3}[/tex]and g(x)=[tex]6^{x}[/tex].

We need to find which functions are polynomials. We know that polynomials is an expression consisting of indeterminates and coefficients that involves only the operations of addition, subtraction, multiplication and non negative integers .

First function is y=[tex]-x^{2} +1/1-2x[/tex]

The above function is not a polynomial because it has not a variable containing power in whole number and it is in fraction form. Two different polynomials can form numerator and denominator in a fraction.

Second function is y=[tex]5x^{4} +x^{2} -8[/tex]

The above function is a polynomial as it has a variable having power and it is not in fraction also.

Third function is  y=[tex]7x^{3}[/tex]

The above function is also a polynomial for the same reason.

Fourth function is g(x)=[tex]6^{x}[/tex].

The above function is also a polynomial.

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