Please hep I am struggling and this dang hw is due by 9!

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

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project

The table shown below gives the approximate enrollment at the university of michigan every fifty years. how many more students were enrolled at the university of michigan in 1950 than in 1900?