Solve for the value of z: 90/15=6/z help asap !!

7.(03.01 lc)which set represents the range of the function shown? {(-1, 5), (2,8), (5, 3), 13, -4)} (5 points){-1, 2, 5, 13){(5, -1), (8, 2), (3,5), (-4, 13)){-4, 3, 5, 8}{-4, -1, 2, 3, 5, 5, 8, 13}

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Simplify each expression for 18, 20, and 21