What does 3(3+4) equal​

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

Which equation matches the graph shown ?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1