Joe spent $15.75 on 21 pieces of fruit to make a salad. Bananas cost $.50 each, oranges cost$.75 each, and
papayas cost $1.25 each. Joe used twice as many oranges
as bananas. How many of each fruit did he buy?

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?

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Can anyone me with this question?