Distribute:
3x-12=12
Add 12 over
3x=24
divide by 3
x=8
Answer:
2.8
Step-by-step explanation:
using cosine rule
= 
s =
= 2.842 = 2.8
The formula of a trapezoid is the sum of the both bases multiplied by the height then divided by 2.
6)
3(n + 4) < - 62
8)
n/3 - 2
hope it helps