Pls help me!! im giving brainliest

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

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 !

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).