2. evaluate the expression for a = –1 and b = 5. show your work.
5a – 7b + b2

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?