If a graphed system shows exactly the same lines, the system has: A. one solution.
B. two solutions.
C. no solution.
D. an infinite number of solutions.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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.

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250