SOMEONE PLEASE PLEASE ANSWER AND EXPLAIN WHY PLS I BEG

Which expression is equivalent to? assume x > 0 and y > 0.

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

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 !