Please answer with clear instructions so that i can apply this to other questions

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 for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

What are the sotions to the quadratic equation 9x^2=4