SOLUTION: Find the value of the variable and ST if S is between R and T. RS=7a,ST=12a,RS=28

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Question 151129: Find the value of the variable and ST if S is between R and T.
RS=7a,ST=12a,RS=28
Answer by orca(409) About Me  (Show Source):
You can put this solution on YOUR website!
From the given information: RS = 7a and RS = 28, we have
7a = 28
Solving for a, we obtain:
a = 28/7 = 4
So
ST = 12a = 12*4= 48