What the value of the expression below when z=4 3z2-10z-4

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4