I need help with these problems

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

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

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax