Answer:
PR=71
Step-by-step explanation:
visualize:
P Q R
O-------------O-------------O
13 58
so if PQ + QR = PR, than 13+58=PR
13+58=71
20------40%
x-----100%
x=(20*100)/40
x=2000/40
x=50
D.
times in the y+9 and y+7 and get y squared + 16x+ 63+80.