The national touring company Spice on Ice visited Seattle, Washington, last year. THe producers held a special promotional ticket sale for one hour. During this time, adult tickets sold for $5, junior tickets (ages 9-17) sold for $2, and children’s tickets (ages 0-8) sold for the ridiculously low price of 10 cents. During this sale, 120 tickets sold for exactly $119. How many of each kind of ticket were sold during the sale?

4. find the geometric mean of 4 and 12. 24 8

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

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?