13. Multiply the following polynomials and simplify:
(6x3 - 4)(6x5 + 8x)
36x8 - 24x5 + 48x4 - 32x
(5x4 + 10x3)(6x5 + 4x4)
30x9 + 80x8 + 40x7
14. Divide:
2x2 - 19x + 45 / x - 5
2x - 9
15. Find the greatest common factor of the following terms:
84, 12, 45
3
16xy8, 48x10y3
16xy3
16. Factor the following polynomials:
2x5 + 14x4 + 18x3
2x3(x -
-7 +
13
2
)(x -
-7 -
13
2
)
x2 + 10x + 16
(x + 8)(x + 2)
x6 + 29x5 + 210x4
x4(x + 15)(x + 14)
17. For question 16, exercises b) and c), solve for x:
x =
-8
and
-2
x =
0
,
-15
and
-14
18. You can purchase your ice cream in a cup or a cone. Orders can be one, two, three, or four scoops. Flavors can be chocolate, vanilla, strawberry or peach. How many choices do you have?
32
19. Use the following data to construct a box and whiskers plot:
16, 10, 29, 19, 26, 28, 24
20. Suppose you toss a coin and spin a spinner numbered 1 through 14
What is the probability of getting heads and 4?
3.57%
What is the probability of getting tails and an even number?
25%
What is the probability of getting heads and a multiple of 7?
7.14%
What is the probability of getting tails and a prime number?
21.43%
What is the probability of not tails and not 8?
46.43%
What is the probability of getting not heads 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 = -2 x - y = 3
A(0.5,-2.5)
4x - 8y = -15 4x + 3y = -17
B(-4.11,-0.18)
22. Write the following fractions in simplest form:
22x6y7z4
44x7y9z2
z2
2xy2
(x - 6)3
(x - 6)6
1
(x - 6)3
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
20x = x2 - 21
x1 = -1, x2 = 21
24. Convert the following repeating decimal into a fraction:
x =
0.1270
1269
9990
25. Solve the following equation:
-10
x
- 13 = -11
x
- 7
x = 36
26. Rationalize the denominator of each fraction below:
25
2
- 9
-
25
2
+ 225
79
27. Use a trigonometric ratio to find x:
x = 17.32 cm
28. The sum of two consecutive even integers is 30. What are the integers? (Hint: use 2x as the first even integer)
a=14, b=16
29. After you leave your house, you walk 12 blocks east and 9 blocks south. How far are you from your house?
I am
15
blocks from my house.
30. A rectangle has a length 2 ft greater than its width. The area of the rectangle is 360ft2. What are the length and width of the rectangle?
13. Multiply the following polynomials and simplify:
(4x5 + 2x4)(5x5 + 6x4 - 7)
20x10 + 34x9 + 12x8 - 28x5 - 14x4
(2x5 + 8x4 + 1)(9x4 + 7x)
18x9 + 72x8 + 14x6 + 56x5 + 9x4 + 7x
14. Divide:
3x2 - 21x + 18 / x - 6
3x - 3
15. Find the greatest common factor of the following terms:
75, 52
1
99xy10, 66x8y5
33xy5
16. Factor the following polynomials:
52x3 + 56x2 + 4x
52x(x +
1
13
)(x + 1)
x2 + 12x + 35
(x + 7)(x + 5)
x4 - 9x3 - 70x2
x2(x - 14)(x + 5)
17. For question 16, exercises b) and c), solve for x:
x =
-7
and
-5
x =
0
,
14
and
-5
18. You can purchase your ice cream in a cup or a cone. Orders can be one, two, three, or four scoops. Flavors can be chocolate, vanilla, strawberry or peach. How many choices do you have?
32
19. Use the following data to construct a box and whiskers plot:
11, 14, 17, 32, 24, 12, 20
20. A bag contains 7 blue balls, 6 red balls, and 5 white balls. You pick a ball from the bag and put it in your pocket. What is the probability of picking:
A white ball?
27.78%
A blue ball or red ball?
72.22%
Two red balls?
9.80%
A blue ball and a white ball?
11.44%
21. Solve and graph the following systems of linear equations:
x + y = -5 x - y = -8
A(-6.5,1.5)
2x - 6y = -8 3x + 3y = -12
B(-4,0)
22. Write the following fractions in simplest form:
14x10y8
28x10y10
1
2y2
(x - 5)
(x2 - 10x + 25)
1
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 + 75 = 20x
x1 = 5, x2 = 15
24. Convert the following repeating decimal into a fraction:
x =
0.1912
1911
9990
25. Solve the following equation:
-
8
x
= -6
x =
64
36
26. Rationalize the denominator of each fraction below:
3
15
15
5
27. Use a trigonometric ratio to find x:
x = 29.70 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 16 blocks east and 12 blocks south. How far are you from your house?
I am
20
blocks from my house.
30. Each side of a square is decreased by 9 m. The area of the newly created square is 1m2. What was the original length of one side of the square?
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