Simplify each and state the excluded values.12x2 8x11)28x16x

Explain how you can use the associative property to evaluate (7x50)x4.

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

Hi, can anyone show me how to do this problem? 100 points for this. in advance