The acidity in a swimming pool is considered normal if the average of three pH readings, p, is
defined such that 7.0 readings are 7.2 and 7.6, which value for the third
reading will result in an overall rating of normal?
1) 6.2
2) 7.3
3) 8.6
4) 8.8

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

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

Which equation shows y= 3 4 x− 5 2 in standard form? a 4x−3y=10 b 3x−4y=10 c 3x−4y=−10 d 4x−3y=−10