Weekly Math Quiz
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math_012_quiz_03.docxMath 012 Quiz 3
Name________________________________
Instructions:
· The quiz is worth 103 points. There are 23 problems, each worth 4 points - Except question 7 which has 5 answers each worth 3 points each. Your score on the quiz will be converted to a percentage and posted in your assignment folder with comments.
· This quiz is open book and open notes, and you may take as long as you like on it provided that you submit the quiz no later than the due date posted in our course schedule of the syllabus. You may refer to your textbook, notes, and online classroom materials.
· You must show all of your work to receive full credit. If a problem does not seem to require work, write a sentence or two to justify your answer.
· Please type your work in your copy of the quiz, or if you prefer, create a document containing your work. Scanned work is also acceptable. Be sure to include your name in the document.
Please remember to show ALL of your work on every problem.
1. If 8x + 5x + 2x + 4x = 114, the 5x + 3 =
Answer:
2. Solve the following equation for A: 2A/3 = 8 + 4A
Answer:
3. Solve the following equation: 7x + 2(x + 9) = −9
Answer
4. Perform the indicated operations and simplify:
Answer:
5. Perform the indicated operations and simplify:
Answer:
6. Factor completely. Show work following the method discussed in Sections 6.1 and 6.3 of our text, and show the check by re-multiplication of the factors. If the polynomial is not factorable, write “prime.”
Answer:
7. Answer each of the questions below:
a) Write the number in scientific notation: 2,354,107
b) Write the number in scientific notation: 0.0512
e) Perform the indicated operations and write the answer in scientific notation:
8. Perform the indicated operations and simplify:
Answer:
9. Solve the equation by the method of factoring. Use the factoring technique discussed in Section 6.4 of our text, and solve following the methods discussed in Section 6.7.
Answer:
10. Factor this problem.
6x4 – 10x 3 + 3x2
Answer:
11. Factor this problem.
2x2 + 2x – 8
Answer:
12. Factor this problem.
d2 + 7d + 10
Answer:
13. Factor this problem.
a4 + 2a2 – 35
Answer:
14. Factor this problem.
9x2 + 18x + 8
Answer:
15. Factor this problem.
49 – 42x + 9x2
Answer:
16. Factor this problem.
(49x4 – 9x6)
Answer:
17. Divide and simplify.
z to the negative 6 power and this is divided by z to the negative second power.
z -6/z -2
18. Convert the number in the sentence into scientific notation.
Population of the United States in 2005 was about 296 million people. (1 million = 10 to the sixth).
19. Add:
(9x8 – 7x4 + 2x2 + 5) + (8x7 + 4x4 – 2x) + (- 3x4 + 6x2 + 2x – 1)
(9x to the 8th minus 7x to the 4th plus 2x square + 5) + (8x to the 7th plus 4x to the 4th minus 2x) + (negative 3x to the 4th + 6x square + 2x – 1)
20. Multiple:
(x + 1) (x3 + 7x2 + 5x + 4)
21. Divide:
(x6 – 13x3 + 42) ÷ (x3 – 7)
(x to the 6th minus 13x cubed plus 42) divided by (x cubed minus 7)
22. The _________of the line y = mx + b is m.
23. Subtract (2x4 + x3 – 8x2 – 6x – 3) – (6x4 – 8x2 + 2x)
(2x to the 4th plus x cubed minus 8x square –minus 3) minus (6x to the 4th minus 8x square plus 2x)
2
515200
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7
5.12910
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3
3.62210
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35
5.2104.510
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2
72930
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22
923437
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2
538415
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