How many different three-number "combinations" are possible on a combination lock having 25 numbers on its dial? assume that no numbers repeat. (combination locks are really permutation locks.) ?

Hamish rides his bike at an average speed of 22 km/h. How far does he ride in: 1. 2 1/2 hours? 2. 3/4 of an hour? 3. 15 minutes?

How to combine like terms in the expression

Is 1/8 irrational or rational

8 12/15 to the next whole

James has 5 friends who are available to go to a baseball game with him, but he only has 2 extra tickets how many different choices does james have for which 2 friends to invite

What is 5,000 in scientific notation?

Which of the following is correct set notation? (1,2,3) 1,2,3 {1,2,3} none of the above

The kindergarten teacher wants to divide 1/2 of her classroom into 5 equal sections for stations

A train traveling at 30 miles per hour reaches a tunnel which is 9 times as long as the train. If the train takes 2 minutes to completely clear the tunnel, how long is the train in miles? (1 mile = 5,280 feet)

The cost for 7 dance lessons is $82. the cost for 11 is $122. write a linear equations to find the total cost C for L dance lessons. How much for 4 lessons?