Answer:

Step-by-step explanation:
Answer: x=2π/3 and x=4π/3
Step-by-step explanation:
The equation we have is
. All we have to do is get cosine alone to find the 2 values of x.

Now that we have our cosine left, we can use our unit circle to figure out when does cosx=-1/2. Cosine is the x value of the coordinate.
x=2π/3
x=4π/3
This would be 13+2x because if x is the number, then 2 times it would be 2x and the sum means addition so it would be 13+2x
The tax rate is 5%
Hope this helps!
Answer:
I need more information, meaning his formula.
Step-by-step explanation: