Please help me if you know the answer please

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

What is the standard form of -5x^2+2x^4-11+x^3+3x

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 !