Christopher’s the backyard is in the shape of a trapezoid. The bases of his back yard are 30 and
40 feet long. The area of his backyard is 525 square feet. Write and solve an equation to find the height of
Christopher’s back yard
1)2)3)

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation: