Help #i like trains

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Maren is buying carpet for her rectangular living room. the room is 4.8 yards wide and 5.2 yards long. how much carpet does she need to buy? enter your answer as a decimal in the box. yd2