5. Selma's class is making care packages to give to victims of a natural disaster. Selma packs one box
in 5 minutes and has already packed 12 boxes.
Her friend Trudy packs one box in 7 minutes and
has already packed 18 boxes. How many more
minutes does each need to work in order to have
packed the same number of boxes?
Please help me step by step

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?