A group of 369 students were surveyed about the courses they were taking at their college with the following results: 158 students said they were taking Math. 169 students said they were taking English. 159 students said they were taking History. 83 students said they were taking Math and English. 53 students said they were taking Math and History. 99 students said they were taking English and History. 25 students said they were taking all three courses. What percentage of students said that they were taking Math?

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?