Which of the following is the simplified version of this expression: 9x+4y+9x+11y+12z-11z a. 20x+9y+12z b. 18x+15y+23z c. 7x+15y+12z

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

How do i put 3(x+7) in distributive property