Answer:
x=-13
Step-by-step explanation:
divide 52 by -4 to get x=-13
Answer:
the defence cards
Step-by-step explanation:
<h3>
Answer: 78.6</h3>
Work Shown:

Multiply across the rows to form a third column. Example: 9*90 = 810 in the first row.

The values in the third column add to 810+1440+1050 = 3300
Divide this over the total number of people which is 9+18+15 = 42
The mean is 3300/42 =78.571 approximately which rounds to 78.6
The correct answer is the third one (x,y) - (-x, -y)