I'm taking a practice exam and don't understand these can you 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?

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 (monthly car loan payment per $1,000 borrowed) i need !

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c