x2
– 1 Let x = -3, 0, 3Ms. Boyd's HW Page
Subject : Math
Homework # 10
Due Wednesday, November 26th, 2008
Must Show all Work. Write the questions first or print out this sheet and attach it to your written work.
1. For a budget, Chris spent $221 in October on entertainment. In December, he spent $455 on entertainment. What is the percent increase?
2. Latrenee weighs 97.5 pounds. Her head itself weighs 16 pounds and her hand weighs 2 pounds. What is the percent of her head’s weight to the nearest tenths of a percent?
3. 13 is what percent of 66.34221 to the nearest hundredths?
4. A rock weighs 502 grams. 1 gram is dirt, 13 grams is iron, 100 grams is copper, 311 grams is platinum and 22 grams is silver.
a. What is the percent of copper to the nearest tenths?
b. What is the approximate percent of iron and silver?
c. What is the percent of dirt and the unknown portion to the nearest millionths?
d. What is the percent of only the known portions to the nearest tenths?
Class 834 Homework #17 Assigned 10/10/08
Due Tuesday 10/ 14/08
Part A.
Red Book page 196 #2-5
Red Book page 202 #2-4
Part B.
State whether each of the following statements is always, sometimes, or never true.
a. If two angles are vertical angles, then they are equal.
b. If two angles are equal, then they are complementary.
c. If two angles are obtuse, then they are supplementary.
d. If two lines intersect, two pairs of vertical angles are formed.
e. Two angles are both complementary and supplementary.
f. Two angles in a triangle are supplementary.
g. If two angles in a triangle are complementary, the triangle is a right triangle.
Class 834 HW #13 10/03/08
1.
Graph y = x2
– 1 Let x = -3, 0, 3
2. A. Determine if the following is NL, L and DV, or L and IndV
B. Determine the equation.
1. At the beginning of school vacation, Eli had nothing in the bank. He then started a part-time job and deposited $25 a week.
2. At the beginning of her vacation, Tanya had $150 in the bank. Each week, she deposited another $25.
3. At the beginning of school, Bret had $150 in the bank that he had earned over the summer. During the first week of school, he withdrew one-fifth if his savings, or $30. During the second week of school, he withdrew one-fifth of the remaining $120. He continued to withdraw one-fifth of what was left in the account each week.
4. At the beginning of school, Ginger had $150 in the bank. Each week, she withdrew $25.
5.
|
X |
4 |
3 |
2 |
5 |
1 |
|
Y |
-7 |
-5 |
-3 |
-9 |
-1 |
6.
|
Z |
-1 |
1 |
3 |
5 |
7 |
9 |
|
W |
-12 |
-6 |
0 |
6 |
12 |
18 |
7.
|
X |
3 |
-1 |
0 |
2 |
4 |
5 |
1 |
|
Y |
10 |
2 |
1 |
5 |
17 |
26 |
2 |
8.
|
M |
4 |
7 |
5 |
3 |
6 |
|
N |
31 |
19 |
26 |
35 |
22 |
9.
|
U |
10 |
12 |
8 |
13 |
7 |
|
Z |
64 |
76 |
52 |
82 |
46 |
10. Match a – c with the correct linear equation below.
a. Adults and children attended the children’s matinee on Saturday. Tickets for adults were $3 each, and tickets for children were $2 each. The theatre sold $80 worth of tickets.
b. Jay bought 80 new holiday ornaments. They came in boxes of either three or four ornaments.
c. Lisbeth held a grand opening at her new coffee shop. She charged a special price of $2 for each person for any drink on the menu. Some people won door prizes that cost her $3 each. At the end of the day, she had $80.
•3x + 2y = 80 •2x – 3y = 80 •3x + 4y = 80
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