5. Jennifer's school is selling tickets to the annual dance competition. On the first day of ticket sales the school sold 2 senior
citizen tickets and 7 student tickets for a total of $40. On the second
day by selling 8 senior citizen tickets and 2 student tickets for a total
of $56.
a.
Define variables:
b.
System:
c.
Solve the systems (optional):

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

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?

Complete the steps to find 4.830 ÷ 5