Help me... please dont answer it if u dont know the ans or almost the ans

Which value of c would make he following expression completely factored? 8x+cy

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.