Answer:
14
Step-by-step explanation:
-3u = 4+5
-3u = 9
u = -3
7u + 7
7(u +1) = 7(-3+1)
7(-2)
mean:54.857142857143
Range:44
median:56
mode:46
Option D is correct, -4 x 2x = 8x
k = -13
-143/11 = -13