In 8 days, a group of workers can plant 72 acres. What is their rate in acres per day

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Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

What expression is equivalent to 42x-56y

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?