Find the reciprocal of the number. multiply to check your answer.
2/3
a.1/2
b.3/2
c.2
d.3

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?

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

Simplify the following expression 48^1/2