Heidi swims 2/3 of a kilometer in 2/3 of an hour. What is Heidi's speed in kilometers per hour? Show your work or explain how you know.

The solution of the equation 5 - 2x = - 4x - 7

Solve for x 3 (x+2) = 5x-7 give your answer as an improper fraction

A journey to work takes a women three quarters of an hour. if she catches the bus at 7:55, when does she arrive?

Name the set of numbers to which 1.68 belongs

Watz is one other way to name 1/3

One cubic foot of sand weights 100 pounds. A square sandbox with 5-foot sides has half of a food of sand in it. How many pounds of sand is the sandbox holding?

10/7 divided by 4 What's the answer

Samuel wants to buy at least twice as many DVDs as CDs. CDs sell for $7 each, and DVDs sell for $12 each. Samuel can spend a maximum of $50. Let c represent the number of CDs, and let d represent the number of DVDs.

The cost of a set of 4 tire is $192. What is the unit rate for the cost of 1 tire?

A CD costs $3.50 more than a tape. Write an expression for the total cost of 1 CD and 1 tape.