Simplify (5ab^2c)(-7ab^4c)

How many $20 bills do you need to have to make $280

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

How do you determine if an ordered pair is a solution to a given equation?