The diagram shows the contents of a jar of marbles. you select two marbles at random. one marble is drawn and not replaced. then a second marble is drawn. what is the probability of selecting a red marble and then another red marble? a) 3/64 b) 1)4 c) 1/20 d) 1/30 ( there are 7 blue marbles, 5 green marbles, and 4 red marbles)

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?