Solve each equation: 12.35x 272x-1

A circular running track is 1/4 mile long. Elena runs on the track, completing each lap in 1/20 of an hour. What is Elena's running speed?

set up an equation and solve each problem. A company has a rectangular parking lot 40 meters wide and 60 meters long. The company plans to increase the area of the lot by 1100 square meters by adding a strip of equal width to one side and one end. Find the width of the strip to be added.

Each month Marla pays a $30 cell phone bill from her back account. At the end of one year, what is the change in the amount of money in Marla's account because of her cell phone bill? Write a multiplication equation to represent the problem. Explain what the product represents.