13. Multiply the following polynomials and simplify:
4x(4x4 + 3x)
16x5 + 12x2
(4x5 - 1)(1x5 + 5x - 7)
4x10 + 20x6 - 29x5 - 5x + 7
14. Divide:
6x2 + 5x - 56 / 2x + 7
3x - 8
15. Find the greatest common factor of the following terms:
39, 78, 98
1
72x8y3, 66x6y2, 90x8y10
6x6y2
16. Factor the following polynomials:
8x5 - 48x4 + 64x3
8x3(x - 4)(x - 2)
x2 - 3x - 40
(x + 5)(x - 8)
x5 - 4x4 - 117x3
x3(x + 9)(x - 13)
17. For question 16, exercises b) and c), solve for x:
x =
-5
and
8
x =
0
,
-9
and
13
18. You are seating 5 people on 5 chairs. How many different ways can those people sit?
120
19. Use the following data to construct a box and whiskers plot:
29, 18, 25, 34, 2, 8, 32, 11, 22, 19
20. A bag contains 6 blue balls, 5 red balls, and 2 white balls. You pick a ball from the bag and put it in your pocket. What is the probability of picking:
A white ball?
15.38%
A blue ball or red ball?
84.62%
Two red balls?
12.82%
A blue ball and a white ball?
7.69%
21. Solve and graph the following systems of linear equations:
x + y = -4 x - y = 9
A(2.5,-6.5)
7x - 9y = 4 7x + 5y = -18
B(-1.45,-1.57)
22. Write the following fractions in simplest form:
22x6y7z4
44x7y9z2
z2
2xy2
(x + 6)
(x + 6)2
1
x + 6
23. Solve the equation below in two different ways. First, solve it using the quadratic formula. Secondly, solve it by completing the square.
x2 + 22x = -21
x1 = -21, x2 = -1
24. Convert the following repeating decimal into a fraction:
x =
0.8
8
9
25. Solve the following equation:
5x + 9
- 18 = -6
x = 27
26. Rationalize the denominator of each fraction below:
21
15
- 10
-
21
15
+ 210
85
27. Use a trigonometric ratio to find x:
x = 23.33 cm
28. The sum of two consecutive even integers is 18. What are the integers? (Hint: use 2x as the first even integer)
a=8, b=10
29. After you leave your house, you walk 12 blocks east and 16 blocks north. How far are you from your house?
I am
20
blocks from my house.
30. A rectangle has a width that is 7 ft less than its length. The area of the rectangle is 60ft2. What are the dimensions of the rectangle?