13. Multiply the following polynomials and simplify:
(1x5 + 3x - 2)(9x5 + 4x2 + x)
9x10 + 4x7 + 28x6 - 18x5 + 12x3 - 5x2 - 2x
(9x3 + 5x + 1)(9x3 - 2)
81x6 + 45x4 - 9x3 - 10x - 2
14. Divide:
16x2 - 4x / 4x - 6
(4x + 5) with a remainder of 30
15. Find the greatest common factor of the following terms:
468, 90, 252
18
364x9y2, 300x10y5, 330y6
2y2
16. Factor the following polynomials:
42x4 - 6x3 - 36x2
42x2(x - 1)(x +
6
7
)
x2 - 19x + 90
(x - 9)(x - 10)
x7 + 3x6 - 10x5
x5(x - 2)(x + 5)
17. For question 16, exercises b) and c), solve for x:
x =
9
and
10
x =
0
,
2
and
-5
18. You have 4 books to read. How many different ways can you read your books?
24
19. Use the following data to construct a box and whiskers plot:
31, 10, 30, 17, 13, 37, 27
20. A bag contains 6 blue balls, 2 red balls, and 7 white balls. You pick a ball from the bag and return it to the bag. What is the probability of picking:
A white ball?
46.67%
A blue ball or red ball?
53.33%
Two red balls?
1.78%
A blue ball and a white ball?
18.67%
21. Solve and graph the following systems of linear equations:
x + y = 1 x - y = -20
A(-9.5,10.5)
3x - y = -10 3x + 8y = 13
B(-2.48,2.56)
22. Write the following fractions in simplest form:
6x8y
18x2y7
x6
3y6
(x + 4)6
(x + 4)7
1
x + 4
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
-8x + 12 = -x2
x1 = 6, x2 = 2
24. Convert the following repeating decimal into a fraction:
x =
0.86
86
99
25. Solve the following equation:
32
x
= 2
x = 8
26. Rationalize the denominator of each fraction below:
14
4
7
27. Use a trigonometric ratio to find x:
x = 24.25 cm
28. The sum of two consecutive even integers is 38. What are the integers? (Hint: use 2x as the first even integer)
a=18, b=20
29. After you leave your house, you walk 8 blocks west and 15 blocks south. How far are you from your house?
I am
17
blocks from my house.
30. Each side of a square is lengthened by 3 m. This makes the area of the square 169m2. What is the original length of a side of the square?
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