Solve the inequality 21 - z < 19

In a race, 28 cyclists got a flat tire on their bikes. If it takes 2.5 minutes to repair each bicycle, how long did it take to repair all the bicycles?

The book fair had a sale where 6 books were $20.34. If you wanted to buy 7 books, how much money would you need

the perimeter of a triangle is 73 centimeters the longest side is 5 cm less than the sum of the two other two sides twice the shortest side is 4 cm less than the longest side find the length of each side of the triangle

If gas costs $3.95 per gallon at a local service station, how many cubic feet of gas can a customer buy with $50

Express the following fraction in simplest form using only positive exponents. 4 (k) ^4/3k9

Half of - 2 3/8 as a fraction

Find all the real square roots of 0.0036

Lisa and Judy are wrapping gifts for their children. Lisa is making the bows. She has 37 and 1/3 yards of ribbon. If each bow uses 4 and 2/3 yards of ribbon, how many bows can Lisa make?

2,250 watts to horsepower (Round answer to the nearest thousandth.

10^m*10^n for m=2 and n=4