I have a simple question please answer it correctly its 10pts and brainiest. :)

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Which is f(5) for the function –2x2 + 2x - 3?

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?