To find the midpoint of a segment you need to use this equation:
(x1+x2/2, y1+y2/2) so if you plug in the numbers its...
9+(-7)/2, 2+(-9)/2
then solve to find x and y coordinate
x= 1 and y= -3.5
so the midpoint of CD is (1,-3.5)
Two digit means it'll have two numbers, and we already know that one of them is 8, and the other is half of 8. Well half of 8 is 4. So know we know the two digits (8 and 4) so that could be 84 or 48. Well we also know that the number has to be divisible by 8. 84/8=10.5 so that's not it, 48/8=6 that one works perfectly. So the answer is 48 :)
U^3 is the simplified answer c