Sandy has $200 in her bank account. if she writes 6 checks for exactly $19.98, what expression describes the change in her bank account?

Match each polynomial with its factorization.

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.