Answer:
A. can I come anwser my question
We know that
if <span>QT is an altitude of triangle QRS
then
</span><span>the measure of angle QTS is equal to 90</span>°
so
6x+36=90-----> 6x=90-36----> x=54/6
x=9
QR=2x-5-----> QR=2*9-5-----> QR=18-5-----> QR=13
the answer is
QR=13
16 would be the range. The lowest value is 5, and the highest value is 21. You just subtract those two which gives you 16! (: