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Math 009

Quiz 1 Page 2

Math 009 Quiz 1

Professor: Jillian Orfeo

Name________________________________

Please remember to show ALL of your work on every problem. Read the basic rules for showing work below BEFORE you start working on the quiz.

a) Each step should show the complete expression or equation rather than a piece of it.

b) Each new step should follow logically from the previous step, following rules of algebra.

c) Each new step should be beneath the previous step.

d) The equal sign, =, should only connect equal numbers or expressions.

Our textbook is full of good models of work shown correctly. Take a look, for instance, at Example 12 in section 1.7.

If you have questions about showing work, please ask.

Did you read the rules for showing work on page 1 of the quiz? If not, please go back to page 1 now and read them. If you do not show work correctly, you will not earn full credit.

1) Simplify the following expression:

18 – 4

2) Simplify the following expression:

3) Simplify the expression:

4) Simplify the expression:

5) Evaluate the expressions below for x = 4 and y = -5:

a)

b)

6) Solve the equation below and show the check of your answer.

y – 4 = -15

7) Solve the equation below and show the check of your answer.

-12 = 3w

8) Solve the equation below and show the check of your answer.

9) The top of a mountain has an altitude of 14,391 feet above sea level and the bottom of a valley nearby is at 146 feet below sea level.

a) Find the difference between these two elevations.

b) Round your answer from part (a) to the nearest 10 feet.

c) Round your answer from part (a) to the nearest 100 feet.

d) Round your answer from part (a) to the nearest 1000 feet.

e) Round your answer from part (a) to the nearest 10,000 feet.

10) The lowest daily temperatures in St. Paul, Minnesota for the first week of January are recorded in the table below:

DAY

Lowest temperature in degrees Fahrenheit

Monday

7º F

Tuesday

-5º F

Wednesday

-8º F

Thursday

-2º F

Friday

4º F

Saturday

-7º F

Sunday

-3º F

Find the average of the low temperatures for that week in St. Paul. Please show all work and write a complete answer, including appropriate units.

End of quiz: please do not forget to write and sign (or type) the required statement explained in the box on page 1 of the quiz.

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