Please help it's due tomorrow D: Maria’s current car gets 24 miles per gallon. Last year she drove 15,000 miles. Last year gas cost an average of $1.35.
a. How much did Maria spend for gas for her car last year?

b. Maria busying a new car that is more gas‐efficient and should average 32 miles
per gallon. If she drives the car 15,000 miles in the next year and gas costs an
average of $1.35, how much will she spend for gas in the next year?

c. How much money will Maria save in gas costs in the next year by driving her new
car as opposed to her old one?

d. What percent decrease in gas costs for one year will Maria realize by driving her
new car?

answer:

your answer is: c. 196 7/8 in^3.

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step-by-step explanation:

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(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240