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Quiz 2 for MATH 1630 Internet and Mathematics I - Spring 2009, Quizzes of Mathematics

The quiz 2 for the math 1630 internet and mathematics i course offered in spring 2009. The quiz covers various topics including solving systems of equations using elimination and substitution methods, cost and revenue functions, and supply and demand equations.

Typology: Quizzes

Pre 2010

Uploaded on 08/19/2009

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MATH 1630 Internet
Spring 2009 Quiz 2 Name:
You must show all work to receive full credit.
1. (5 points) Solve the following system of equations using the elimination method.
3x + 4y = -2
2x + 3y = -1
2. (5 points) Solve the following system of equations using the substitution method.
2x – 3y = 11
3x + y = 11
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MATH 1630 Internet Spring 2009 Quiz 2 Name:

You must show all work to receive full credit.

  1. (5 points) Solve the following system of equations using the elimination method.

3x + 4y = - 2x + 3y = -

  1. (5 points) Solve the following system of equations using the substitution method.

2x – 3y = 11 3x + y = 11

  1. Page 127 – Problem 14 A manufacturer of DVD players has monthly fixed costs of $ and variable costs of $65 per unit for one particular model. The company sells this model to dealers for $100 each. Answer each of the following questions in items a. through f. below.

a. (2 points) Write the function for total monthly costs.

b. (2 points) Write the function for total revenue..

c. (2 points) Write the function for profit. Simplify as much as possible.

d. (3 points) List the marginal revenue (include units). Write a sentence explaining its meaning.

e. (3 points) Calculate the amount of profit if 120 DVD players are manufactured and sold.

f. (4 points) Calculate the break-even point.

  1. (4 points) Textbook Pg 132, Problem 23d
  2. (4 points) Textbook Pg 132, Problem 34
  3. (6 points) Solve the following equation. Round any decimal answer to 4 places.

( x^ +^2 )( x +^5 )^ =^28

  1. (6 points) Solve the following equation. Round any decimal answer to 4 places.

2

x x

  1. (4 points) Textbook pg 149, Problem 46a.