Please answer this correctly and do not guess or put random stuff. I will report if you do so.

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Four quarts of a latex enamel paint will cover about 200 square feet of wall surface. how many quarts are needed to cover 98 square feet of kitchen wall and 52 square feet of bathroom wall