Question 334962
the topic says measuring segments 
there a line segment with the point G, H, I
Draw the line segment GI. Put H between G and I. 
QUESTIONS:
1. If GH=31 and HI=11 then GI= GH+HI = 31+11 = 42
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2. If GH=45 AND GI =61 then HI= GI-HG = 61-45 = 16
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THEN next paragraph read:GH= 7Y+3, HI= 3Y-5, and GI= 9Y+7
Apply that information to the line segment you drew.
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a. what is the value of Y?
Since GI = GH+HI
9Y+7 = 7Y+3+3Y-5
9Y+7 = 10Y-2
Y = 9
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b. Find 
GH = 7Y+3 = 7*9+3 = 66 
HI = 3Y-5 = 3*9-5 = 22  
GI = 9Y+7 = 9*9+7 = 88
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Cheers,
Stan H.