5x + 10x = 180
15x = 180
X = 12
5 x 12 = 60
10 x 12 = 120
The angles are 60° and 120°
Foil
15+6i-20i-8i^2
-8i^2=8
15+8+6i-20i
23-14i
6a
So you would write the factored equation as 6a(b+2)
Start with the decimal point after the 8.
Now move it to the left 7 places (from the exponent -7).
You need to add place holder zeros.
Answer is:
0.000000849 which is choice B.
