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gjhfdfg Group Title

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

  • 2 years ago
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  1. dpaInc Group Title
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    can you find g(-5) = ????

    • 2 years ago
  2. dpaInc Group Title
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    after you find g(-5), put that answer into f...

    • 2 years ago
  3. gjhfdfg Group Title
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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?

    • 2 years ago
  4. dpaInc Group Title
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    yes... but i only wanted g(-5)... so g(-5) = -4*(-5) + 3 = ???? what's the answer here?

    • 2 years ago
  5. gjhfdfg Group Title
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    23

    • 2 years ago
  6. dpaInc Group Title
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    good... now that you found g(-5)=23, that 23 goes into f. so you need to find f(23) = ???

    • 2 years ago
  7. gjhfdfg Group Title
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    It would be -53 wouldnt it?

    • 2 years ago
  8. dpaInc Group Title
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    that is the definition of (f ° g)(-5) = f(g(-5))

    • 2 years ago
  9. dpaInc Group Title
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    yes.... :) f(23) = -2*(23) - 7 = -46 -7 = -53

    • 2 years ago
  10. dpaInc Group Title
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    good work... :)

    • 2 years ago
  11. gjhfdfg Group Title
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    Thanks for your help.! =)

    • 2 years ago
  12. dpaInc Group Title
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    yw...:)

    • 2 years ago
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