HELPPP PLEASE DUE IN 5 MINS

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?

Two numbers have a sum of -19. one number is x. what expression represents the other number?