Please help me solve this.

1. −4x−4x2+26

2. 5(x2-y2-2x+2y

Step-by-step explanation:

1.16−25+(2x+7)(5−2x)

(16−25)+(2x+7)(5−2x)

−9+(2x+7)(5−2x)

(2x+7)(5−2x)−9

10x−4x2+35−14x−9

(10x−14x)−4x2+(35−9)

=−4x−4x2+26

step-by-step explanation:

you divide the denominator by the numerator on both sides and if the quotients are equal then the fractions are equivalent

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6