Answer:
D. 11n + 12
Step-by-step explanation:
You can simplify the 4n + 7n to be 11n by adding them together.
This means the answer is 11n + 12.
-2y +2
(x-y+1) - (x+y+-1)
Distribute the minus sign
x-y+1 -x-y+1
Combine like terms
312miles/6hours=52mph
52mph
X is 2 bcz 3+5 is 8 then 8/4 is 2