zayzay162
26.12.2019 •
Mathematics
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.
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Ответ:
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
RT = 5
Ответ: