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Mathematics 7 Online
OpenStudy (donnie1999):

HELP PLEASE!

OpenStudy (donnie1999):

OpenStudy (allen27):

hey man just google your question up ull then find the anwser

OpenStudy (freckles):

@donnie1999 f(g(7)) means to find g(7) then to take that value and plug it into f

OpenStudy (freckles):

So g(7)... to find this you look got what g(x) equals which is g(x)=x-3

OpenStudy (freckles):

if g(x)=x-3 then g(7)=?

OpenStudy (donnie1999):

4?

OpenStudy (freckles):

right g(x)=x-3 means g(7)=7-3

OpenStudy (freckles):

so g(7)=4

OpenStudy (freckles):

so you have found so far that f(g(7)) is f(4)

OpenStudy (freckles):

you have one more step to perform and you are done

OpenStudy (freckles):

that step is to evaluate f(4)

OpenStudy (freckles):

recall f(x)=x^2+x so f(4)=?

OpenStudy (donnie1999):

I got 28

OpenStudy (donnie1999):

ohh no i meant 20 thanks :D

OpenStudy (freckles):

ok since f(4)=4^2+4 which equals 16+4=20

OpenStudy (freckles):

So this is what you did f(g(7)) = f(4) = 20

OpenStudy (donnie1999):

yes :D

OpenStudy (freckles):

great job

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