Brody went on vacation and purchased postcards and stamps to send letters home while he was away. Two postcards and four stamps cost $3 . A postcard cost 4 times as much as a stamp. Set up a systems of equations that could be used to find the cost of a postcard.

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