Find two numbers that the exact answer is between 3x 567

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

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