Posted by natalie on Thursday, November 12, 2009 at 1:50pm.
a 68 mile trip uses 2 gallons of gas. how many gallons would you use on a 110 mile trip? round to the nearest tenth of a gallon.

10th grade algebra not ms.sue  zorro, Thursday, November 12, 2009 at 2:02pm
I would just set it up as a proportion and cross multiply. 68/2=110/? or 2/68=?/110

10th grade algebra not ms.sue  natalie, Thursday, November 12, 2009 at 2:07pm
what is the ? for

10th grade algebra not ms.sue  DrBob222, Thursday, November 12, 2009 at 2:22pm
The ? is the answer. You solve for that.

10th grade algebra not ms.sue  natalie, Thursday, November 12, 2009 at 2:32pm
how like what do i do

10th grade algebra not ms.sue  Haley, Saturday, November 14, 2009 at 6:33pm
68 = 110
 
2 x
This is how to set up the proportion that zorro was talking about, although he did it incorrectly.
Cross multiply:
110 (2) = 220
68 (x) = 68x
Therefore:
220 = 68x
Solve for x by dividing by 68 on both sides.
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