assignment #3

Quiz 3

1) Solve the following system by Gaussian elimination:

a) [ 3 4 −6 −8

| 12 −24

]

b) [ 6 2 3 4

| −4

−17 ]

2) You invested $25,000 into two accounts: one that has simple 3% interest, the other with 2% interest. If your total interest payment after one year was $600, how much was in each account after the year passed?

For the following problem, graph the system of inequalities. Show (by shading in) the feasible region.

3)

y ≤ – 2x + 4 , y ≥ – 3x + 2

4)

2x + y < 1 , y > – 1

5)

3x + 2y ≥ 6 , x + 2y ≤ 2