Suppose that income is a function of age. The following function represents the relation between average annual income I and age a.
I(a)=-55a^2 +5,113a-54,421
(a) For what age does average income I equal $30,000?
(b) For what age does average income I equal $60,000?

a.)the line for function b is steeper

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

c

step-by-step explanation: