What is the value of -9r-7 when r= 2?
-25
-18
11
45

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Acomputer store buys a computer system at a cost of $370.80. the selling price was first at $ 618, but then the store advertised a 20 % markdown on the system. answer parts a and b. a. find the current sale price.

The perimeter of a rectangular rug is 24 feet. the length of the rug is 1 2/5 i s width. what is the area of the rug