Respuesta :

mathstudent55

Answer:

A. 5

Step-by-step explanation:

PQ + QR + RS = PS

2x - 6 + 1 + x - 4 = 18

3x - 9 = 18

3x = 27

x = 9

RS = x - 4

RS = 9 - 4

RS = 5
The full length is 18.
2x - 6 + 1 + x - 4 = 18
Tidy up gives: 3x -9 = 18
3x = 27
Therefore x = 27/3 = 9.
RS is x-4. Therefore RS is 9-4 = 5

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