Answer:
7mm
Step-by-step explanation:
A parallelogram has 2 sets of equal sides, so if one side is 7mm, then the opposite side is too.
-9x^3(x^2 - 4x - 21) =
-9x(x - 7)(x + 3) <===
Answer: is it supposed to be 2y+y=4?
2x10^2 and 6x 10^
Hope I helped UwU
