What can be added to get -18 and multiplied to here -144? (number nine）

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Can (2,3 and square root 10) be sides ona right triangle?

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