If f(x) =5x^3-2 and g(x) =2x+1, find (f+g)(x)

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

Areal estate agent earns $32,000 a year plus $1,000 for each apartment he sells. write an equation that shows the relationship between the number of apartments abe sells,n, and the total amount he earns in a year,e. what is the total amount abe would earn from selling 10 apartments in one year

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?