A dolphin is at -28 feet. It swims up and jumps to a height of 8 feet. Write a subtraction expression for the vertical distance the dolphin travels.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?

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.