What is the length of QR? 8 units
LY у
10
8
P
Q
11 units
9 units
id
-2 0
4
8
T
R
7 units
-
$
-6
-8
- 10
Done

Me because some of question i don’t understand

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours