Please help I have a test tomorrow

I need explanation with D on both of these​

Assessment items item 1 garrett is a member of a movie club. he pays a monthly service fee of $5.75 and $2.50 for each movie he rents. which expression represents how much money he will spend for renting x number of movies a month?

Brent wants to know what is 5 x 1/2

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area