Simplify:
if... x<1
if... -5≤x<5

If the discriminant if a quadratic equation is 4 which statement describes the roots?

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?

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).