How to find the mean

Ruben bought 6 new books for his collection. This increased his collection by 12%. How many books did he have before his purchases.

What is the solution set of - |-x| = - 12? A. no solution B. {-12} C. {12} D. {-12, 12}

What is W in this equation, - 12u+13=8w-3

a college has a student to teacher ratio of 30 to 2. if there are 180 teachers at the college, how many studentd attend the college?

There are 1,000 workers in a a factory. Each worker works 30 hours a week and is paid $10.50 an hour, How much does the company pay the workers altogether each week?

The total surface area of a cube is 114 in.² what is the length of each side of the cube? It is __ in

Simplify the expression exactly. (18) (72) The #'s in () are in that house thing A. 6 B. (90) C. 36 D. 1296

At the bus station buses begin their route at 6am bus A has a long route and leaves the station every 75 minutes bus B has a short route and leaves the station every 15 minutes what is the next time bus A and bus B will leave the bus station at the

Solve (t-5) = 2 where t is a real number. Simplify your answer as much as possible.

What is the width of a rectangle with an area of 5/8in2 and a length of 10inches