VERY EASY, WILL GIVE 50 POINTS FOR CORRECT ANSWER ASAP AND WILL GIVE BRAINLIEST.

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project