A flu epidemic is spreading through a town of 48,000 people. It is found that, if x and y denote the numbers of people sick and well in a given week, respectively, and if s and w denote the corresponding numbers for the following week, then
1/3x + 1/4y = s
2/3x + 3/4y = w.
(a) Write this system of equations in matrix form.

(c) Suppose that 13,000 people are sick in a given week. How many were sick the preceding week?

Transcribed Image Text:

9 -3||13,000 [12,000 4||35,000] 36.000 -8