Consider the system of equations x1 – 2x2 + 2x3 = 1, x3 = 4, - -3x1 - x2 + x1 + 5x2 – 12x3 = 8. - (a) Use the Gaussian elimination method to reduce the system to upper triangular form. Clearly label the operations that you use. (b) If the system has no solution, then clearly state this; if it has a unique solution, then find it; and if it has an infinite number of solutions, then find the most general solution.

A long year-end status report for work is 153 pages long. You need to print 14 copies for a meeting next week. How much is the paper going to cost for those reports? Paper is sold in reams (500 pages) for $3.14 each.$Give your answer to the nearest cent, only for the paper you use (partial reams are OK)

3 divided by 3.20

Catalina works part-time at a bakery earning $7.50 an hour. In the last five days, her time card shows that she worked 3.3, 2.9, 4.0, 3.5, and 2.1 hours. What is her gross pay for the five days?