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
10 800 0 to the first problem
Answer:
2x^2 - 3x - 1
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
90° angle
90° - existing 42°
the missing angle is 48°