there are 5 red marbles, 7 green marbles, 4 black marbles, and 8 blue marbles in a bag. find green or black

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?