Need help plzz!! Needed asap! Please explain. Thank you

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Which graph corresponds to the function f(x) = x2 + 4x – 1?

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 !