Match each expression written in standard form to the equivalent expression in factored form

In the rectangle below ac=30 units what is de

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y