Answer:
B
Step-by-step explanation:
Angles 5 & 6 are supplementary
-1/2
cos(x+pi) = -cos(x), so the answer is -1/2.
x = 20 and they are vertical angles
2x = 40
x = 20
f(x)=1550-15x
x is the amount of days and f(x) is the total after x amount of days. PLEASE MARK BRAINLIEST
The first option....x^2-x-12