ANSWER

EXPLANATION
We want to find the exact value of cos(150°).
150° makes an angle of 30° with the positive direction of the x-axis and it is also in the second quadrant.
The cosine ratio is negative in the second quadrant.
Using the unit circle,

Answer:
6x + 13 = 12x - 20
Step-by-step explanation:
6x + 13 = 12x - 20
146 area of trapazoid 90
area of triangle 56
P3(4) = p12 them p12 * p8 = P160 (false)