Which equation would help find the measure of ZM? x +52 + 78 = 180(ANSWER)

52 + x = 180 + 78

180 +52 = 78 + x

180 + x = 78 +52

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)