To determine the total amount of gas it took to mow the lawn this past summer, Erin multiplied the number of times she mowed the lawn, 24, by the amount of gas it takes to mow the lawn each time, Three-eighths of a gallon. What is the total amount of gas? StartFraction 1 Over 64 EndFraction of a gallon StartFraction 1 Over 9 EndFraction of a gallon 9 gallons 64 gallons

(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

alaska, florida, nevada, south dakota, texas, washington and wyoming, tenessee and new hampshire.

step-by-step explanation:

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6: 4= 3/2

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1.44 centimeters is the correct answer