Need help and show work plz

Consider the function f(x)=-5x+3 what is f(-2)

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in