The length QT is 36 units
The attached image represents the missing information in the question
From the image, we have:
RQ =QT
Substitute known values
5x + 1 = 3x + 15
Evaluate the like terms
2x = 14
Divide by 2
x = 7
Substitute x = 7 in QT = 3x + 15
QT = 3 * 7 + 15
Evaluate
QT = 36
Hence, the length QT is 36 units
Read more about parallelograms at:
https://brainly.com/question/24056495
#SPJ1