In 2009, a family spent $5,320 on groceries. In 2010, their groceries cost $5,840. Which statement gives the best choice for the percent of change in the family groceries cost for 2010

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?

Y=21.95x+10 y=22.45x solve by substitution

What is the perimeter of a rectangle if the length is 5 and the width is x?