How can u use math to detirmine fractions equalvalent to 1/4

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

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?