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Mathematics 7 Online
OpenStudy (anonymous):

If f(x) = x + 4 and g(x) = 5x - 2, find (gf)(4).

OpenStudy (daniellelovee):

I think that you have to multiply both equations and then multiply what you got by 4

OpenStudy (anonymous):

ok

OpenStudy (daniellelovee):

(x+4)(5x-2)=(the equation you got/number)(4)=answer

OpenStudy (anonymous):

so how do add the two equations ?

OpenStudy (faiqraees):

or easy way is plug 4 in both functions and multiply their answer

OpenStudy (daniellelovee):

you can use the FOIL method

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