gjhfdfg
Let f(x) = 2x  7 and g(x) = 4x + 3. Find (f ° g)(5).



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dpaInc
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can you find g(5) = ????

dpaInc
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after you find g(5), put that answer into f...

gjhfdfg
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I'm a little lost, so pretty much just do this, 2*(5) 7 and 4*(5) + 3? Is that what your saying?

dpaInc
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yes... but i only wanted g(5)... so g(5) = 4*(5) + 3 = ????
what's the answer here?

gjhfdfg
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23

dpaInc
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good... now that you found g(5)=23, that 23 goes into f. so you need to find f(23) = ???

gjhfdfg
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It would be 53 wouldnt it?

dpaInc
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that is the definition of (f ° g)(5) = f(g(5))

dpaInc
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yes.... :)
f(23) = 2*(23)  7 = 46 7 = 53

dpaInc
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good work... :)

gjhfdfg
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Thanks for your help.! =)

dpaInc
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yw...:)