SOLUTION: Hi I need help with an online question its Algebra 1 sem 1...please hurry! What is 2*f(2)/3? f(x)=x^2+5/4^x-3

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Question 636923: Hi I need help with an online question its Algebra 1 sem 1...please hurry! What is 2*f(2)/3? f(x)=x^2+5/4^x-3
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
2%2A%22f%282%29%22%2F3

f(x) = %28x%5E2%2B5%29%2F%284%5Ex-3%29

First we find f(2) from f(x) by substituting 2 for x
and simplifying:

f(2) = %282%5E2%2B5%29%2F%284%5E2-3%29

f(2) = %284%2B5%29%2F%2816-3%29

f(2) = 9%2F13

Now we need to find %282%2Af%282%29%29%2F3.

So we substitute 9%2F13 for the f(2) in

%282%2Af%282%29%29%2F3.

%282%2A%289%2F13%29%29%2F3.

%2818%2F13%29%2F3.

18%2F13÷3

18%2F13·1%2F3

6%2F13

Edwin