Solve these equations

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

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 i need !

Can someone check if i did this correct. it’s number 4 if you’re wondering.