PLEASE HELP 6TH GRADE MATH

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

Which number completes the inequality? 2/3 < _ < 7/9

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.