Can these be answered in 48 hours for the fee of $26?

1. Solve by substitution:

x + y = 6
2x - 4y = 0

2. Does the shaded region of the graph of the system of equations x < 3, x + 7< 4 include the point (2, 3)? How do you know?

3. Explain what it means for a system of equations to be inconsistent and how you can tell whether a system is inconsistent using Gaussian elimination.

4. What does it mean for two matrices to be equal?

5. Let A be a 2 x 3 matrix and B be a 2 x 3 matrix.

a) Is it possible to add A and B?

b) Is it possible to do the multiplication AB?

c) Is it possible to do the multiplication BA?