Answer:
The answer is 18x - 8.
Step-by-step explanation: Trust me, an know a lot about math.
Rewrite <span>2cos x + 1 = 0 as:
2 cos x = -1, and then cos x = -1/2
x must be in Quadrant II or Quadrant III, since the adj. side is negative.
Note that the angle 120 has adj. side -1 and hyp 2. So 120 degrees is one solution.
Now what about a possible 2nd solution, to be found in Quadrant III? That would be -120 degrees, which has the same terminal line as does 240 degrees.
No soap.
So, the solution is 120 degrees.</span>
Answer:
B
Step-by-step explanation:
the reason this because vertically opposite angles the equal so it's also 72
Answer:
1. 30x + 20
2. -10x + 60
Step-by-step explanation:
Answer:
Graph 2.
Step-by-step explanation:
The graph is decreasing.
Hope this helps!
If not, I am sorry.
