Solve for x

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If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

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 !

The function show two sisters' savings account and the rate at which they plan to deposit money