Simplify -2x x 3x x -x

What is the measure of one interior angle of a pentagon

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13