Which one of the following equations represents a parabola? 1) y = -2(x - 3)
2) y = (x - 5)^2
3) y = 2^x
4) y = -(x + 2)(x - 1)^2

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21

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:

the answer is  

a.

28 ft2

step-by-step explanation: