4cx - 5c = -12x +d, c and d are integers. what is value of c and d?

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+ 2/y is it a polynomial in one variable or not? and if so, why?

Lucy spent $165 in december using a new credit card. in january, she began paying between $15 and $25 each month towards her account balance.