Mr. chan buys a roll of paper towel for $2.19 a bottle of window cleaner for $2.69. in this state there is a 4 percent sale tax on these items. mr. chan also buys a gallon of milk for $3.95. there is no sales tax on milk. mr. chan has a $5 coupon to usr at the store.

b1) write a number sentence to find mr. chan's total bill. what is his total bill?

b2) is there more than one way to compute this total?

b3) explain how you know which operation(s) to use.

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?