Answer: 43.5
Step-by-step explanation:

The width of a peak depends on A. Standard deviation
Answer:
x = 9
Step-by-step explanation:
Sum of all angles of a triangle = 180
63 + 7x + 6x = 180
63 + 13x =180
13x = 180 - 63
13x = 117
x = 117/13
x = 9
All you have to do is plug in the 2 for x which gives you 8 as the answer