Wetzel                                                                                                                                                                    Fall 2006

Math 155

Test #2

                                                                                                                                               Name:___________________

Read the directions carefully and double-check you work.  Good Luck

Graph the following equations.

1.)  2y - x = 4

2.)  x = -2

3.)  Given the equation, 2x + y = 8.

          a.)  State the x-intercept. ________

           b.)  State the y-intercept. ________

          c.)  Write the equation in Slope-intercept form. ________________

Completely simplify the following.

4.)                                   5.) 

Solve the following.

6.)  -6x = 18                                       7.)  6x – 3 = 33

8.)  2x – 7 = 6 + x                               9.)  3(5 – x) = 4(2x + 1)

10.)  Express 0.014 in scientific notation.

11.)  Express x in decimal notation.

12.)  Convert the following decimal to a percent.

          a.)  9.83                                    b.)  0.467

13.)  Convert the following percent to a decimal.

          a.)  73%                                    b.)  36.25%

 14.)  Convert the following fractions to a percent.

          a.)                                         b.) 

15.)  What is 8% of 300?

16.)  A person borrows $3000 at a simple interest rate of 6% for a period of 2 years. 

          a.)  Find the loan’s future value or the amount due at 2 years.

          b.)  How much interest accumulated over the 2 years?

28.)  A person invests $10,000 in an account earning 9% compounded semi-annually.  How much will be in the account at the end of 5 years?

29.)  Solve the following proportions.

          a.)                                           b.) 

BONUS:   You are choosing between two long-distance telephone plans.  Plan A has a monthly fee of $15 with a charge of $0.08 per minute for all long distance calls.  Plan B has a monthly fee of $3 with a charge of $0.12 per minute for all long distance calls.  For how many minutes of long distance calls will the costs for the two plans be the same?  ( 5 points )