Name:    Chapter 8 Post Test

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

Determine whether is a solution of the system of equations below.

 a. b. c. d. e.

2.

Use the graph of the equations to determine the solution (if any) of the system of linear equations.

 a. b. c. d. e.

3.

Use the graph of the equations to determine the solution (if any) of the system of linear equations.

 a. b. c. d. e. no solution

4.

Select the graphs of the equations and approximate any solutions of the system of linear equations.
 a. d. b. e. c.

5.

Select the graphs of the equations below and find solutions of the system of linear equations (if any).

 a. d. b. e. infinite many solutions c.

6.

A small company produces bird feeders that sell for per unit. The cost of producing each unit is , and the company has fixed costs of . Let the cost function be the total cost to produce x bird feeders and let the revenue function be the total revenue from selling x bird feeders. Graph the cost and revenue function and find the point of intersection of the graphs.
 a. d. b. e. c.

7.

If possible, solve the system below by the method of substitution.

 a. b. c. d. e.

8.

Solve the system of equations below by the method of substitution. Verify the solution by including a graph.

 a. d. b. e. c.

9.

Solve the system of linear equations by the method of substitution.
 a. b. c. d. e.

10.

Find the value of such that the system of linear equations below is inconsistent.

 a. b. c. d. e.

11.

If possible, solve the system below by the method of elimination. Use the graph to check the solution.

 a. b. c. d. e.

12.

If possible, solve the system below by the method of elimination.

 a. b. c. d. e.

13.

If possible, solve the system below by the method of elimination.

 a. b. c. d. e.

14.

Solve the system of equations below by the method of elimination. Verify the solution by including a graph.

 a. d. b. e. c.

15.

Use the most convenient method (graphing, substitution, or elimination) to solve the system of linear equations.

 a. b. c. d. e.

16.

You are offered two different sales jobs. Job A offers an annual salary of plus a year-end bonus of of your total sales. Job B offers an annual salary of plus a year-end bonus of of your total sales. How much would you have to sell to earn the same amount at each job?
 a. b. c. d. e.

17.

You and a friend go to a Mexican restaurant. You order tacos and enchiladas, and your friend orders tacos and enchiladas. Your bill is plus tax, and your friend's bill is plus tax. How much does each cost? Round your answer to one decimal place.
 a. b. c. d. e.

18.

Graph the solution of the system of linear inequalities below.

 a. d. b. e. c.

19.

Graph the solution of the system of linear inequalities below.

 a. d. b. e. c.

20.

Graph the solution of the system of linear inequalities below.

 a. d. b. e. c.