13. Multiply the following polynomials and simplify:
10x2(3x5 + 6x4)
30x7 + 60x6
(2x5 + 8x4 - 10)(3x3 + 3x2)
6x8 + 30x7 + 24x6 - 30x3 - 30x2
14. Divide:
5x2 - 11x + 7 / x - 2
(5x - 1) with a remainder of 5
15. Find the greatest common factor of the following terms:
154, 405, 462
1
90xy2, 312x4y4
6xy2
16. Factor the following polynomials:
27x3 + 24x2 + 4x
27x(x +
2
9
)(x +
2
3
)
x2 + 6x - 16
(x + 8)(x - 2)
x9 - 4x8 - 5x7
x7(x + 1)(x - 5)
17. For question 16, exercises b) and c), solve for x:
x =
-8
and
2
x =
0
,
-1
and
5
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, strawberry or peach. How many choices do you have?
24
19. Use the following data to construct a box and whiskers plot:
33, 15, 11, 1, 27, 18, 13, 14, 32, 29
20. A bag contains 2 blue balls, 3 red balls, and 3 white balls. You pick a ball from the bag and put it in your pocket. What is the probability of picking:
A white ball?
37.50%
A blue ball or red ball?
62.50%
Two red balls?
10.71%
A blue ball and a white ball?
10.71%
21. Solve and graph the following systems of linear equations:
x + y = -16 x - y = 19
A(1.5,-17.5)
x - 3y = -11 9x + 8y = -19
B(-4.14,2.29)
22. Write the following fractions in simplest form:
32x8y4
8x2y
4x6y3
(x - 5)4
(x - 5)6
1
(x - 5)2
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
x2 - 22 = -9x
x1 = -11, x2 = 2
24. Convert the following repeating decimal into a fraction:
x =
0.59
59
99
25. Solve the following equation:
-6
x
- 20 = -7
x
- 3
x = 289
26. Rationalize the denominator of each fraction below:
6
14
4 +
7
8
14
- 14
2
3
27. Use a trigonometric ratio to find x:
x = 18.38 cm
28. The sum of two consecutive odd integers is 16. What are the integers? (Hint: use 2x+1 as the first odd integer)
a=7, b=9
29. After you leave your house, you walk 16 blocks south and 12 blocks east. How far are you from your house?
I am
20
blocks from my house.
30. A rectangle has an area of 55ft2. Its width is 6 ft less than its length. What are the dimensions of the rectangle?
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