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August 3rd, 2011, 03:47 PM  #1 
Newbie Joined: Aug 2011 Posts: 7 Thanks: 0  Algebraic Expression Problem
If g(x)=2x+5(3x2), 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! 
August 3rd, 2011, 03:55 PM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,978 Thanks: 1160 Math Focus: Elementary mathematics and beyond  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. 
August 3rd, 2011, 04:06 PM  #3 
Newbie Joined: Aug 2011 Posts: 7 Thanks: 0  Re: Algebraic Expression Problem
You find it out by filling in X's with the anser in parentheses by the F.

August 3rd, 2011, 04:25 PM  #4 
Newbie Joined: Aug 2011 Posts: 7 Thanks: 0  Re: Algebraic Expression Problem
Please help me answer this. I need it by tomorrow. :/

August 3rd, 2011, 04:40 PM  #5  
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 522 Math Focus: Calculus/ODEs  Re: Algebraic Expression Problem Quote:
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  
August 3rd, 2011, 05:09 PM  #6 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,978 Thanks: 1160 Math Focus: Elementary mathematics and beyond  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! 
August 3rd, 2011, 07:22 PM  #7 
Member Joined: May 2011 From: West Virginia Posts: 44 Thanks: 0  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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