Answer:
C x = 28°
Step-by-step explanation:
(x +30)° + (3x +10)° + x° = 180°
x +30 + 3x + 10 + x = 180
5x + 40 = 180
5x = 140
x = 28°
The answer is 4.
The easiest way to determine the value of statements like this is to turn the percentage into a decimal and then multiply.
20% * 20
.20 * 20
4
i(5 - i) + 2i (i + 6) =
distribute
5i - i^2 +2i^2 +12i
5i - (-1) +2 (-1) +12i
5i +1 -2 +12i
-1+17i
