Step-by-step explanation below
Answer:
Step-by-step explanation:
Divide everything in the equation by tan 6

Then add 1 to both sides

divide by tan 10

Then plug that into 
which is

Simplifies to 4
Answer:
b=−2
w=15
Step-by-step explanation:
The mean is the highest peak. The question mention if 1 standard deviation is the distance between mean to the line. Therefore one standard deviation above the mean is 40. And the 2 standard deviation below is 10.