Q1. Linear cost and revenue equations are shown below. Find the break-even quantity.

C(x) = 21x + 23600, R(x) = 421x

( enter answer below )

Q2. Find the solution of the following system using Gauss elimination. (Enter your answers as a comma-separated list.)

6x + 2y = -10

10x + 2y = -14

(x,y) = ( ____?______ )

Q3. Find the solution of the system using Gauss elimination. (Enter your answers as a comma-separated list.)

-8x +2y = -6

18x -3y =15

(x,y) = ( ____?____ )

Q4. Find the solution of the following system using Gauss elimination. (Enter your answers as a comma-separated list.)

3x + y + 5z. = 18

2x - y + 3z = 3

3x + 2y + 3z = 8

(xx,y,z) = ( _____?_____)