13. Multiply the following polynomials and simplify:
(3x4 + 8x3 + 9x2)(1x3 + 8x - 6)
3x7 + 8x6 + 33x5 + 46x4 + 24x3 - 54x2
(9x5 + 3x2)(1x4 + 8x2)
9x9 + 72x7 + 3x6 + 24x4
14. Divide:
12x2 - 50x + 50 / 4x - 10
3x - 5
15. Find the greatest common factor of the following terms:
35, 32, 30
1
42x7y5, 50x5y8
2x5y5
16. Factor the following polynomials:
56x3 - 98x2 + 42x
56x(x -
3
4
)(x - 1)
x2 - 2x - 80
(x - 10)(x + 8)
x5 - 20x4 + 91x3
x3(x - 13)(x - 7)
17. For question 16, exercises b) and c), solve for x:
x =
10
and
-8
x =
0
,
13
and
7
18. You have 7 CDs. How many different ways can you listen to them?
5040
19. Use the following data to construct a box and whiskers plot:
13, 12, 28, 11, 22, 3, 9
20. A bag contains 2 blue balls, 3 red balls, and 6 white balls. You pick a ball from the bag and put it in your pocket. What is the probability of picking:
A white ball?
54.55%
A blue ball or red ball?
45.45%
Two red balls?
5.45%
A blue ball and a white ball?
10.91%
21. Solve and graph the following systems of linear equations:
x + y = -13 x - y = -19
A(-16,3)
3x - 7y = 10 8x + 4y = 7
B(1.31,-0.87)
22. Write the following fractions in simplest form:
22x6y7z4
44x7y9z2
z2
2xy2
(x - 5)3
(x - 5)2
x - 5
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
-25 = x2 + 10x
x1 = -5, x2 = -5
24. Convert the following repeating decimal into a fraction:
x =
0.32
29
90
25. Solve the following equation:
-
x + 3
+ 13 = -8
x = 438
26. Rationalize the denominator of each fraction below:
49
21 -
15
1029 + 49
15
426
27. Use a trigonometric ratio to find x:
x = 34.00 cm
28. The sum of two consecutive even integers is 46. What are the integers? (Hint: use 2x as the first even integer)
a=22, b=24
29. After you leave your house, you walk 8 blocks east and 6 blocks north. How far are you from your house?
I am
10
blocks from my house.
30. The length of a rectangle is 3 more than thrice its width. The area of the rectangle is 396ft2. What is the length and width of the rectangle?
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