13. Multiply the following polynomials and simplify:
(9x4 + 6x3)5x3
45x7 + 30x6
(6x5 + 7x2)(7x4 + 9x3)
42x9 + 54x8 + 49x6 + 63x5
14. Divide:
16x2 - 36x + 14 / 4x - 7
4x - 2
15. Find the greatest common factor of the following terms:
13, 60
1
90x10y, 60x6y4, 18x9y7
6x6y
16. Factor the following polynomials:
9x3 - 6x2 - 3x
9x(x +
1
3
)(x - 1)
x2 - 4x - 45
(x + 5)(x - 9)
x7 - 18x6 + 45x5
x5(x - 15)(x - 3)
17. For question 16, exercises b) and c), solve for x:
x =
-5
and
9
x =
0
,
15
and
3
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:
21, 18, 16, 13, 19, 3, 32, 5, 24
20. A bag contains 6 blue balls, 7 red balls, and 7 white balls. You pick a ball from the bag and put it in your pocket. What is the probability of picking:
A white ball?
35.00%
A blue ball or red ball?
65.00%
Two red balls?
11.05%
A blue ball and a white ball?
11.05%
21. Solve and graph the following systems of linear equations:
x + y = 6 x - y = -15
A(-4.5,10.5)
5x - y = -9 4x + 9y = -8
B(-1.82,-0.08)
22. Write the following fractions in simplest form:
80x6y2
20x10y6
4
x4y4
x6 - 11x5 + 18x4
x6(x - 2)
(x - 9)
x2
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
-12x + 20 = -x2
x1 = 10, x2 = 2
24. Convert the following repeating decimal into a fraction:
x =
0.165
149
900
25. Solve the following equation:
-
x + 7
+ 16 = -20
x = 1289
26. Rationalize the denominator of each fraction below:
21
7 +
3
147 - 21
3
46
27. Use a trigonometric ratio to find x:
x = 31.11 cm
28. The sum of two consecutive even integers is 34. What are the integers? (Hint: use 2x as the first even integer)
a=16, b=18
29. After you leave your house, you walk 12 blocks south and 9 blocks east. How far are you from your house?
I am
15
blocks from my house.
30. The length of a rectangle is 6 less than 3 times the width. What are the dimensions of the rectangle if the area is 144ft2?
13. Multiply the following polynomials and simplify:
-2(2x - 8)
-4x + 16
(3x3 + 7x)(4x4 + 10x2 + 9x)
12x7 + 58x5 + 27x4 + 70x3 + 63x2
14. Divide:
15x2 + 50x + 63 / 5x + 5
(3x + 7) with a remainder of 28
15. Find the greatest common factor of the following terms:
15, 66, 45
3
75x8y5, 65x6y2
5x6y2
16. Factor the following polynomials:
33x4 + 11x3 - 22x2
33x2(x + 1)(x -
2
3
)
x2 + 12x + 36
(x + 6)(x + 6)
x4 - 22x3 + 112x2
x2(x - 14)(x - 8)
17. For question 16, exercises b) and c), solve for x:
x =
-6
and
-6
x =
0
,
14
and
8
18. You have 6 CDs. How many different ways can you listen to them?
720
19. Use the following data to construct a box and whiskers plot:
13, 4, 25, 23, 1, 9, 8, 33
20. A bag contains 5 blue balls, 4 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?
43.75%
A blue ball or red ball?
56.25%
Two red balls?
6.25%
A blue ball and a white ball?
13.67%
21. Solve and graph the following systems of linear equations:
x + y = -11 x - y = -1
A(-6,-5)
x - 3y = 5 8x + 8y = 3
B(1.53,-1.16)
22. Write the following fractions in simplest form:
52x8y3
13xy9
4x7
y6
(x - 1)7
(x - 1)3
(x - 1)4
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
3x - 18 = -x2
x1 = -6, x2 = 3
24. Convert the following repeating decimal into a fraction:
x =
5.57
502
90
25. Solve the following equation:
24
x
= 2
x = 6
26. Rationalize the denominator of each fraction below:
35
14
+ 15
-
35
14
- 525
211
27. Use a trigonometric ratio to find x:
x = 44.00 cm
28. The sum of two consecutive even integers is 34. What are the integers? (Hint: use 2x as the first even integer)
a=16, b=18
29. After you leave your house, you walk 4 blocks east and 3 blocks south. How far are you from your house?
I am
5
blocks from my house.
30. A rectangle has an area of 143m2. Its width is 2 m less than its length. What are the dimensions of the rectangle?
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