John roller skates 48km in 3 hours. What is his average speed in kilometers per hour?

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document