Question 1197781
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Problem 13


Replace every copy of x with 5. Then follow the order of operations PEMDAS to simplify.


f(x) = -13x^2-7x^4 - 11x
f(5) = -13(5)^2-7(5)^4 - 11(5)
f(5) = -13(25)-7(625) - 11(5)
f(5) = -325-4375-55
f(5) = -4755


<font color=red>Answer: -4755</font>


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Problem 14


Use the same idea to compute g(7) like so
g(x) = -15x^2+14x-10
g(7) = -15(7)^2+14(7)-10
g(7) = -647


This means
g(g(7))
is the same as
g(-647)


And,
g(x) = -15x^2+14x-10
g(-647) = -15(-647)^2+14(-647)-10
g(-647) = -6,288,203


Therefore, g(g(7)) = -6,288,203
For more information, search out "function composition" or "composite functions".


<font color=red>Answer: -6,288,203</font>
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