Answer:
The coefficient of x is 2.
Step-by-step explanation:
1) Add the numbers
7y + 4x + 4 - 2x + 8
7y + 4x + 12 - 2x
2) Combine like terms
7y + 4x + 12 - 2x
7y + 2x + 12
3) Rearrange items
7y + 2x + 12
2x + 7y + 12
The lowest common multiple of 2 and 7 is 14, so 14 days will pass before he does both chores again.
To find 9 you have to do Diameter x pi and when you do that you get 7.85
12 = 48/4
48/4 - 33/4 = 15/4 = 3 3/4
