Please help me I really need help

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Evaluate the expression. (9 + 5)(3 + 2)0