In how many ways can 12 different books be distributed among four children so that the two oldest children get four books each and the two youngest get two books each?

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

When keisha installed a fence along the 200 foot perimeter of her rectangular back yard, she left an opening for a gate.in the diagram below, she used x to represent the length in feet of the gate? what is the value? a. 10 b. 20 c. 25 d. 30

How many ordered pairs of positive integers satisfy xy=32?