Asked by Vanessa

How would you do this?

Rs=8y
St=4y+8
RT=115y-9

a.Find the value of y
b. Find rs, st, rt
Answered by Steve
RS+ST=RT
8y+4y+8 = 115y-9
103y = -17
y = -17/103
now plug that into the expressions for the segments
Answered by Vanessa
How'd you get that? I was trying the problem and couldn't get it
Answered by Vanessa
I'm sorry rt=15 not 115
Answered by Vanessa
I got y=-17 Am I right?
Answered by Steve
well, let's see:

8y+4y+8 = 15y-9
3y = 17
y = 17/3

right off, you should have realized that a negative value for y makes no sense, since we are dealing with line segments, which have positive lengths.

I'm still bothered by the fraction answer. A simple exercise like this usually has a nice integer result.
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