20 points if o n = 8 x − 8 , l m = 7 x + 4 , n m = x − 5 , and o l = 3 y − 6 , find the values of x and y for which lmno must be a parallelogram.

Name the quadrilaterals that have four equal sides.

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Which of the following expressions is equal to 2x^2+8