Evaluate (x-2y)^2 if x=2 and y=-3

I’m stuck on this equation, anyone got the answer?

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?