13. Multiply the following polynomials and simplify:
6x2(9x4 + 4x3 + 9x2)
54x6 + 24x5 + 54x4
(6x5 - 4)(2x4 + 5x2 + x)
12x9 + 30x7 + 6x6 - 8x4 - 20x2 - 4x
14. Divide:
3x3 + 8x2 + 6x + 16 / 3x + 8
x2 + 2
15. Find the greatest common factor of the following terms:
60, 20
20
56x8y8, 65x9y6, 66x8y6
x8y6
16. Factor the following polynomials:
50x4 + 95x3 + 30x2
50x2(x +
3
2
)(x +
2
5
)
x2 - 13x + 40
(x - 5)(x - 8)
x6 - 10x5 - 56x4
x4(x - 14)(x + 4)
17. For question 16, exercises b) and c), solve for x:
x =
5
and
8
x =
0
,
14
and
-4
18. You are seating 3 people on 3 chairs. How many different ways can those people sit?
6
19. Use the following data to construct a box and whiskers plot:
23, 15, 10, 1, 37, 9, 12, 2
20. A bag contains 6 blue balls, 7 red balls, and 6 white balls. You pick a ball from the bag and return it to the bag. What is the probability of picking:
A white ball?
31.58%
A blue ball or red ball?
68.42%
Two red balls?
13.57%
A blue ball and a white ball?
9.97%
21. Solve and graph the following systems of linear equations:
x + y = -12 x - y = -4
A(-8,-4)
3x - 10y = -4 4x + 5y = -9
B(-2,-0.2)
22. Write the following fractions in simplest form:
22x6y7z4
44x7y9z2
z2
2xy2
(x2 - 4x + 4)
(x - 2)
x - 2
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
x - 2 = -x2
x1 = 1, x2 = -2
24. Convert the following repeating decimal into a fraction:
x =
0.483
479
990
25. Solve the following equation:
2
x
= 11
x =
4
121
26. Rationalize the denominator of each fraction below:
5
5
+ 25
-
5
- 25
124
27. Use a trigonometric ratio to find x:
x = 19.05 cm
28. The sum of two consecutive odd integers is 28. What are the integers? (Hint: use 2x+1 as the first odd integer)
a=13, b=15
29. After you leave your house, you walk 3 blocks east and 4 blocks north. How far are you from your house?
I am
5
blocks from my house.
30. A rectangle has a length 4 ft greater than its width. The area of the rectangle is 32ft2. What are the length and width of the rectangle?
13. Multiply the following polynomials and simplify:
(4x4 - 5)(10x5 + 9x3 + 3x2)
40x9 + 36x7 + 12x6 - 50x5 - 45x3 - 15x2
(2x5 + x4)(8x4 + 8x2)
16x9 + 8x8 + 16x7 + 8x6
14. Divide:
5x3 + 30x2 + x + 6 / x + 6
5x2 + 1
15. Find the greatest common factor of the following terms:
75, 24
3
45x9y9, 60x7y9, 36y7
3y7
16. Factor the following polynomials:
45x3 - 47x2 + 2x
45x(x - 1)(x -
2
45
)
x2 + 16x + 63
(x + 9)(x + 7)
x9 - x8 - 42x7
x7(x + 6)(x - 7)
17. For question 16, exercises b) and c), solve for x:
x =
-9
and
-7
x =
0
,
-6
and
7
18. You can purchase your ice cream in a cup or a cone. Orders can be one, two, or three scoops. Flavors can be chocolate, vanilla or strawberry. How many choices do you have?
18
19. Use the following data to construct a box and whiskers plot:
3, 26, 12, 14, 31, 37, 40, 29, 38
20. Suppose you toss a coin and spin a spinner numbered 1 through 10
What is the probability of getting tails and 3?
5.00%
What is the probability of getting heads and an even number?
25%
What is the probability of getting heads and a multiple of 4?
10%
What is the probability of getting tails and a prime number?
20%
What is the probability of not tails and not 10?
45%
What is the probability of getting not tails and not a whole number?
0%
What is the probability of heads or tails and a whole number?
100%
What is the probability of getting heads?
50%
21. Solve and graph the following systems of linear equations:
x + y = -19 x - y = 7
A(-6,-13)
9x - 6y = -17 8x + 2y = -8
B(-1.24,0.97)
22. Write the following fractions in simplest form:
22x6y7z4
44x7y9z2
z2
2xy2
x2(x - 2)
x8 - 7x7 + 10x6
1
x4(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.
-x2 = 24x - 52
x1 = -26, x2 = 2
24. Convert the following repeating decimal into a fraction:
x =
0.173
172
990
25. Solve the following equation:
-
10
x
= -7
x =
100
49
26. Rationalize the denominator of each fraction below:
1
15 -
7
15 +
7
218
27. Use a trigonometric ratio to find x:
x = 33.77 cm
28. The sum of two consecutive even integers is 42. What are the integers? (Hint: use 2x as the first even integer)
a=20, b=22
29. After you leave your house, you walk 6 blocks north and 8 blocks west. How far are you from your house?
I am
10
blocks from my house.
30. A rectangle has a width that is 4 m less than its length. The area of the rectangle is 117m2. What are the dimensions of the rectangle?
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