Answer:
a=2,b=4. (3a+b)=3*2+4=10.
2n - 4.
Step-by-step explanation:
(n+8) + (n−12)
= n + 8 + n - 12
= n + n + 8 - 12
= 2n - 4.
7212960
You have to round up since the number in the ones place is a 5.
