What is the probability of selecting two red marbles in a row, without replacing them? the bag contains 4 blue, 2 red, 1 yellow, 5 green, 6 purple, and 2 pink marbles

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Carlos spent 1 1/4 hours doing his math homework he spent 1/4 of his time practicing his multiplication facts how many hours to carlos been practicing his multiplication facts

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?