Mathematics High School

The winning time for a race are shown in the table.

Which answer describes the average rate of change from year 2 to year 4?

A) the winning time increased by an average of 0.4 second per year from year 2 to year 4.

B) the winning increased by an average of 0.8 second per year from year 2 to year 4.

C) the winning time increased by an average of 0.475 second per year from year 2 to year 4.

D) the winning time increased by an average of 0.267 second per year from year 2 to year 4.

Answers

Answer 1

Answer:

The winning time increased by an average of 0.4 second per year from year 2 to year 4.

Step-by-step explanation:

I just took the quiz

Answer 2

The winning time for a race displayed in the table would be:

A). The winning time increased by an average of 0.4 seconds per year from year 2 to year 4.

Find the increase in winning time:

Given that,

Year Winning Time(seconds)

1 27.5

2 28.4

3 28.7

4 29.2

5 29.44

The total change in the time = (0. + 0.3 + 0.5 + 0.24)/4

= 0.485 seconds

If we round off, it becomes 0.5 seconds.

Therefore, it can be considered that an average of 0.5 seconds changes every year from year 2 to 4.

Thus, option A is the correct answer.

Learn more about "Time" here:

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Related Questions

Rewrite the expression without parentheses.
12m - (3 + 8m)

Answers

Answer:The answer is 1m

Step-by-step explanation:

12 - (3+8m)

(3+8m)=11m

12-11m =1m

Determine whether the expression is a polynomial. If it is a polynomial, find the degree
and determine whether it is a monomial, binomial, or trinomial.
3y^2 – 2

Answers

Answer:

This expression is a polynomial. The largest exponent is 2, therefore, it is in the quadratic degree. It is a binomial because it has two parts: 3y² and -2.

Four basketballs and six baseballs cost $44. Five basketballs and four baseballs costs $48. Determine the cost for one basketball and one baseball.

Answers

Answer:cost for basket ball= $8 and

cost of baseball = $2

Step-by-step explanation:

Step 1

Let the cost of basket ball be represented as x

and cost of baseball = y such that

Four basketballs and six baseballs cost $44 will be expressed as

4x+ 6y= 44 --- eqn 1 also

Five basketballs and four baseballs costs $48 will be expressed as

5x+ 4y= 48--- eqn 2

Step 2

Having obtained two expressions we can now sole

4x+ 6y= 44 --- eqn 1

5x+ 4y= 48--- eqn 2

multiplying eqn 1 by 5 and eqn 2 by 4

20x+ 30y =220---- eqn 3

20x+ 16y=192-----eqn 4

subtracting equation 4 from 3 we now have

14y=28

y= 28/14

y=2 = $2

from equation 1

4x+ 6y= 44, putting the value of y=7 to find x

4x+ 6(2)= 44

4x+12= 44

4x= 44-12

4x=32

x= 32/4

x=8=$8

cost for basket ball= $8 and

cost of baseball = $2

im not sure how to do this

Answers

Step-by-step explanation:

plz make me brainliest ....

8 = –(q + –6) + 18
solve for q

Answers

Answer:

q=16

Step-by-step explanation:

math

way

.com

Answer:

q = 16

Step-by-step explanation:

You have $500 in a savings account. How long will it take to double that
amount at an 8% annual interest rate?

Answers

Answer:

Step-by-step explanation:

The formula for compound annual interest is A = P(1 + r)t where

A = Accumulated or final amount (double $500 = $1000)

P = Principal or original amount ($500)

r = Rate as a decimal (0.08)

t = Time in years

1000 = 500(1 + 0.08)t

2 = 1.08t

Take the logarithm of both sides. I prefer the natural logarithm ln, but if you're more comfortable with base 10 logs they will work just as well

ln(2) = ln(1.08t)

ln(2) = t*ln(1.08)

t = ln(2)/ln(1.08)

t = 9.0065 years

Check: 500*1.089.0065 = $1000

Area as a sum:
Area as a Product:

I need the are as a sum Nd a product

Answers

Given:

The area model.

To find:

The area as a sum and area as a product.

Solution:

The four terms of the area model are [tex]2x^2,10x, 3x, 15[/tex].

The area as a sum is the sum of all the terms of given area model.

Area as a sum = [tex]2x^2+10x+3x+15[/tex]

= [tex]2x^2+13x+15[/tex]

The area as a product is the factor form of sum of all the terms of given area model.

Area as a product = [tex]2x^2+10x+3x+15[/tex]

= [tex]2x(x+5)+3(x+5)[/tex]

= [tex](x+5)(2x+3)[/tex]

Therefore, the area as a sum is [tex]2x^2+13x+15[/tex] and the area as a product is [tex](x+5)(2x+3)[/tex].

Evaluate each expression if: a = 5, b = 3, and c = 4.
4) 6a-4b5)
I

Answers

Answer:

-30

Step-by-step explanation:

Simply substitute the values in for the variables:

6(5) - 4(3)(5) ~ parentheses indicate multiplication in this case

30 - 60 = -30

Find the missing side length.
12
15

Answers

Answer:

you need to show the shape or somet or else I can't rlly help

Answer:

If the hypotenuse is 15 and one of the sides is 12, the answer is 9.

If these are the side lengths, the hypotenuse is square root of 369, which is about 19.21

Step-by-step explanation:

Solve the system of linear equations by substitution.
y = -2x + 10
y = x +1

Answers

Step-by-step explanation:

y=14

y=1

thats the answer.

Ordena de menor a mayor 13 5 10 10 4 6 5 59 29 50 24

Answers

Answer:24

Step-by-step explanation:

lol

Pls help me add me on ig hairstyles2530

Answers

Answer:

Step-by-step explanation:

If the given lengths of 7cm, 24cm, and 25cm for the sides of a triangle satisfy the equation of the Pythagorean theorem then yes!

At the carnival, it costs $10 to enter. It then costs $1.50 per ride you go on.
If you have $28, how many rides can you go on? *
1 point

Answers

Answer:

18.6

Step-by-step explanation:

28 divided by 1.50 equals 18.6

The number of rides will be equal to 12 in the Carnival.

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that at the carnival, it costs $10 to enter. It then costs $1.50 per ride you go on. The total amount is $28.

The number of rides will be calculated by forming an equation below,

A = 10 + 1.5R

28 - 10 =1.5R

1.5R = 18

R = 18 / 1.5

R = 12

Therefore, the number of rides will be equal to 12 in the Carnival.

To know more about an expression follow

https://brainly.com/question/18186591

#SPJ2

can someone help me wit dis?

Answers

Answer:

Step-by-step explanation:

the answer is 7
3x+10=31
-10 -10
3x=21
/3 /3
x= 7

im confused can someone help me

Answers

Answer:

y intercept is -8

slope is 3x

Step-by-step explanation:

the definitions of them speak for themselves

The following exchange rate is given: £1 = 1.11 euros. Convert £8 into euros.

Answers

Answer:

= 8.88

Step-by-step explanation:

£1 = 1.11 x £8 = 8.88 (euro)

= 8.88

This is because if £1 = 1.11, it’s just like x’ing 8 by lots of ones. so the answer would be 8.88

Write down in terms of n an expression for the nth term of the following sequence
12 16 20 24 28

Answers

Answer:

4n + 8

Step-by-step explanation:

can someone please help me quickly??

Answers

Answer:

i think your answer would be 35

Step-by-step explanation:

oh sorry it's answer is 42.

calculate by adding all the individuals less than 40

What is the value of 6x+7y−5 when x = 2 and y = 3?

Answers

Answer:

Step-by-step explanation:

6(2) + 7(3) - 5

12 + 21 -5

It's a good idea to get into the habit of using parenthses

when substituting numbers in for variables.

Since x = 2 and y = 3, 6x + 7y - 5 is 6(2) + 7(3) - 5.

Simplifying from here, we get 12 + 21 - 5 or 33 - 5 which is 28.

Figure ABCD is reflected across the y-axis.
What are the coordinates of A' B', C. and D'?
Enter your answer by filling in the boxes.
AOD
10-0-7
B'OD
D'OD

Answers

Answer:

yreflection in y-axis (x, y) → (-x, y) **the sign of the x-coordinate changes, the y value stays the same**

A'(1, 4)

B'(5, 8)

C'(5, 4)

D'(4, 2)

Step-by-step explanation:

Answer:

A'(1, 4)

B'(5, 8)

C'(5, 4)

D'(4, 2)

Step-by-step explanation:

took the test

Sara has 600 quarters and dimes in her piggy bank which totals $123.75. How many quarters and
how many dimes does she have?

Answers

Answer: well each quarter is .25c and 600x.25=150 which is over $123.75. So, this is a trick question or this question is not possible to answer.

Step-by-step explanation:

what is -7/5 rounded to the nearest tenth?

Answers

Answer:

-1.4

Step-by-step explanation:

-7/5 = -1.4

Which set of numbers are true for the inequality? n + 3 < 5 plssss help

Answers

Answer:

n<2

Step-by-step explanation:

On the graph, You go left

Charlotte is making a scrapbook. She needs a piece of ribbon that is 3/4 ft long. What is that fraction written as a decimal?

Answers

3/4 in decimal form is 0.75.

Dan has twice as many stickers as Cam does. If Dan gives Cam 15 of his stickers he will still have 22 more than Cam. How many stickers does each boy have?

Answers

You can solve this question by setting up an equation. Dan has twice as many stickers as Cam does. We can call Dan 2x, and Cam x. So the equation would be:
2x-15=x+22.
Then solve this equation:
Add 15 on both sides
2x=x+37
Subtract x on both sides
2x-x=37
X=37.
Therefore Cam has 37 stickers, and Dan has 74 stickers.

given: x+y=10 if x=-21, what is y?

Answers

Answer: y = 31

Step-by-step explanation: all you need to do is plug in the x

since x = -21 we can put: -21 + y = 10

now we add 21 to both sides giving us: y = 31

Answer:

(-21,22)

Step-by-step explanation:

x+y=10

x=-21

subtitue the x value

-21+y=2

solve for y

y=22

Then write your answer by ordered pair

(-21,22)

42% OF WHAT NUMBER IS 2? If you could please use the fiery cross?

Answers

Answer:

2100

Step-by-step explanation:

Sorry i dont know what the fiery cross is

A rectangular field measures 400yds x 600yds. Find the length of the diagonal of the field.

Answers

That would be 1000 yards - add the both together

Please help!!
What is the measure of angels DEF and angles DEG?

Answers

47+ 30 is 77 so def is 77 and 103 is deg. and

Identify the slope and y-intercept of the graph of the equation. y =3/5 x + 1

Answers

Answer:

slope = 3/5

y intercept = 1

Step-by-step explanation:

i think

Answer:

Slope: 3/5

Y-int: 1

Step-by-step explanation:

Slope intercept form is y=mx+b, with m being the slope being the y-int. So, m is 3/5 and b is 1 in the equation.

(hope this helps :P)

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