Evaluate the expression when y=5.
z² – 7y - 6

Cass decided to sell game programs for the hockey game. the printing cost was over 20 cents per program with a selling price of 50 cents each. cass sold all but 50 of the programs, and made a profit of $65. how many programs were printed? letting p represent the number of programs printed, set up an equation that describes this situation. then solve your equation for p.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?