Answer:
n= -10
Step-by-step explanation:
-20+n=1+2n which simplifies to -21n+n=2n which simplifies to -20n=2n which simplifies to
a²-17=8
5²-17= 25-17
= 8
12×6×2+6×5×2+12×5×2= 324m^2
The answer is C
Straight angles means a line which straight and has no turning.
