3 − 3k + 7k = 5b find the equation for k

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

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?