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soldier1979 [14.2K]
3 years ago
7

suppose S is between R and T. Use the segment addition postulate to solve for each variable. RS= 7y-4 , ST= y+5 , RT= 28

Mathematics
1 answer:
blagie [28]3 years ago
6 0
RS+ST=RT

RS=7y-4

ST=y+5  using RS and RT in the first equation gives you:

7y-4+y+5=RT  combine like terms on left side

8y+1=RT, and we are told that RT=28 so:

8y+1=28  subtract 1 from both sides

8y=27  divide both sides by 8

y=27/8

(RS=19 5/8, ST=8 3/8, RT=28)
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