How would I find NLM?​

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 !

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

Solve the system of equations. x=-2y+1 and x+2y=9. show work