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August 3rd, 2011, 02:47 PM   #1
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Algebraic Expression Problem

If g(x)=2x+5(3x-2), find:

a. g(1)
b. g(0)
c. g(-3)
d. g(x) = 6, x=
e. g(x)=-2, x=

Please help, I need his by tomorrow.
Or at least please point me in the correct direction. Thanks!
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August 3rd, 2011, 02:55 PM   #2
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Re: Algebraic Expression Problem

a. If g(x) = 2x + 5(3x - 2), g(1) = 2(1) + 5(3(1) - 2) = 2 + 5(3 - 2) = 2 + 5(1) = 7.

d. If g(x) = 6, 6 = 2x + 5(3x - 2) = 2x + 15x - 10 = 17x - 10, x = (6 + 10)/17 = 16/17.
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August 3rd, 2011, 03:06 PM   #3
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Re: Algebraic Expression Problem

You find it out by filling in X's with the anser in parentheses by the F.
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August 3rd, 2011, 03:25 PM   #4
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Re: Algebraic Expression Problem

Please help me answer this. I need it by tomorrow. :/
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August 3rd, 2011, 03:40 PM   #5
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Re: Algebraic Expression Problem

Quote:
Originally Posted by trapezoids
You find it out by filling in X's with the anser in parentheses by the F.
Yes. If it were me, I would simplify g(x):



Thus:

a) g(1) = 17(1) - 10 = 7
b) g(0) = 17(0) - 10 = -10

etc.

d) 17x - 10 = 6

17x = 16

x = 16/17
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August 3rd, 2011, 04:09 PM   #6
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Re: Algebraic Expression Problem

[color=#00AA00]MarkFL[/color] has the right idea. I should have looked at simplifying g(x), but it seemed simple enough at the time!
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August 3rd, 2011, 06:22 PM   #7
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Re: Algebraic Expression Problem

Yeah, just like they were saying, just plug in your values, where the x variables are present.
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