area of the ceiling = 55 x 55 = 3025 square feet
3025/275 = 11 cans
-3x + 7x = -12
You need to add like terms.
4x = -12
Then, you need to divide both side by 4.
x = -3
So the answer is:
A) x = -3
Answer:

Step-by-step explanation:
Given
12.7, 22, 23.5, 24, 11, 22
Required
Determine the M.A.D
Start by calculating the Mean

In this case, n = 6
So:



Subtract the mean from each element






Take absolute value of the results above






The mean of the above gives the MAD



