Answer:
D) CE=10
Step-by-step explanation:
FG=6x-7
CE=18-4x
2FG=CE
2(6x-7)=18-4x
12x-14=18-4x
simplify
16x=32
x=2
substitute
CE=18-4(2)
CE=18-8
CE=10
I don't understand what you're trying to ask the picture is blurry
The mean should be 80.5. This means the average number of test scores is 80.5. The mean absolute deviation should be 15.5. This means the average of the values are less than the mean by about 15.5.