Answer:
49
Step-by-step explanation:
We are given
The average income, I, in dollars is

(a)
now, we are given
average income is $275000
so, 
now, we can set them equal
and then we can solve for x


we will have to use quadratic formula


we get


we need to find youngest age
It means that we need to choose smallest value
so,
............Answer
(b)
we are given
x=40
so, we can plug it and find I

..............Answer
Answer: about 22 minutes
Explanation: its hard to explain but trust me i checked my work
A. 70°
Supplementary angles always = 180°
Where 180 - 110 = 70
110+ 70 = 180
Answer: 3.082185x^2
Step-by-step explanation: Find the exact value using trigonometric identities