Video streaming company a charges a one-time $40 membership fee and $2 per video stream. video streaming company b charges a one-time $20 membership fee and $4 per video stream. let the variable s represent the amount of videos streamed and let the variable c represent the cost. for how many video streams will the cost be the same for both companies?

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?