Asnwer:
QR = 18
Explanation:
If Point M is the midpoint of segment QR, then the following expressions are true
QM = MR and;
QM + MR = QR
Given
QM = 2x + 5 and MR = 5x – 1,
Recall that QM = MR
2x + 5 = 5x - 1
2x - 5x = -1-5
-3x = -6
x = -6/-3
x = 2
Get the length of QR
QR = QM + MR
QR = 2x+5 + 5x -1
QR = 7x +4
QR = 7(2) + 4
QR = 14+4
QR = 18
Hence the length of QR is 18
