4. decide if the segment lengths form a triangle. if they do, indicate whether the triangle is acute, right, or obtuse.
(a) 16, 30, 34 ? (b) 4, 5, 6?
(c) 7, 24, 26? (d) 14, 21 , 36?

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?