R,S, and T are collinear, and S is betrween R and T. If RS=x+1, ST=2x-2, and RT=5x-5, find RT.
2 answers:
If you put and label the three points in a line, you will see that RS + ST = RT.
Then you only need to substitue with the expressions given for RS and ST to find RT.
RT = x +1 + 2x - 2 = 3x - 1
Also, RT = 5x - 5
Then, 3x - 1 = 5x - 5
5x - 3x = 5 - 1
2x = 4
x = 4/2 = 2
NOw substitute x in any of the expressions for RT:
RT = 5x - 5 = 5(2) - 5 = 10 - 5 = 5
Answer: RT = 5
Answer:
correct answer is RT=5x-5
Step-by-step explanation:
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