Plz give me the awnser

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

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Which type of graph would allow us to quickly see how many students between 100 and 200 students were treated?