8 Gold Math HW Feb20 (due Feb 27)
Moby Math Times: _____
Name _________________Score_____
+ _____ + _____ + _____ + _____ + _____ = _________ Total Time
1. Draw the list of the number classifications from your ICE book with a subset of each number.
Natural
Whole
Integer
Rational
Irrational
(8.1.1d) 2. Draw a picture of the following square and their roots. Circle the irrational numbers.
√4
√7
√16
√24
3. Why are some square roots irrational and others are not irrational?
(8.1.1d) 3. List a subset of integers. _____________________________________
(8.1.1d)4. List a subset of rational numbers. ________________________________
5. Read pages 210 to 212 in your textbook. Write a description of the key concept from these pages and
the processes you would use to solve that type of problem.
6. (8.2.5d) A boy that is 58 inches tall casts a shadow that is 72 inches long. At the same time a nearby
tree casts a 180 inch shadow. How tall is the tree? (Hint: get help from problem 5)
7. (8.2.5d) A map has a scales of 1.5 inches = 500 miles. How many inches on the map would represent
1200 miles? (Hint: get help from problem 5)
8. Read page 36 of your text and describe the key concept. Give an example of this concept and how to
solve the problem.
9. (8.1.3b) Solve:
|-9 + 3| - 4
10. (8.1.3b) Solve: - | 5| - |-12|
11. Read page 29 and 30 of your textbook. Describe the key concept on this page and provide an
example and a solution.
12. (8.1.3a) What is the value of 42- 2( 5+ 32) ?
_____________________
Show your work here.
13. (8.1.3a) 6. What is the value of
Show your work here.
−𝟓
𝟕
−𝟑
- ( 𝟕 ) ? ___________________
14. (8.1.3e) Read your text pages 190-191. Describe the key concept and write an example and solution
for the concept.
(8.1.3e) 15. There are 120 students in our grade level. If 3 out of 5 students are boys, how many are girls?
(8.1.3e) 16. There are 25,000 people in North Platte. If 4 out of 5 people like Taco John’s food, how many
people do not like Taco John’s?
Study this example. You have 15 marbles in a jar. (G G G G, R R R R R, B B B). What is the
probability of drawing a blue marble, replacing it, and then drawing a green marble?
P ( B, G) =
𝟑
𝟏𝟓
𝟒
𝟏𝟐
⦁ 𝟏𝟓 = 𝟐𝟐𝟓 =
𝟒
𝟕𝟓
𝟑
(8.4.3.b) 17. Where did the 𝟏𝟓 come from? Explain.
𝟒
Where did the 𝟏𝟓 come from? Explain.
What does the ⦁ between the fractions mean?
𝟏𝟐
𝟒
How did 𝟐𝟐𝟓 turn into 𝟕𝟓?
(8.4.3.b) You have 18 marbles in a jar. (G G G G G G, R R R R R , B B B, Y Y Y Y). What is the
probability of drawing a yellow marble, replacing it, and then drawing a red marble?
18.
P(Y, R) =
What is the probability of drawing a green marble, replacing it, and drawing another green marble?
19. P(G, G) =
(8.2.1e) 20. Find the missing angle.
x
53°
28°
85
(8.2.1e) 21. Find the missing angle.
X
42
(8.2.1d) Use the drawing at the right to identify
the types of angles.
(adjacent, vertical, supplementary, complementary,
Alternate interior, alternate exterior, corresponding)
22. ‫ے‬2 & ‫ے‬4 are _________________________
1
2
3
4
23. ‫ے‬3 & ‫ے‬2 are _________________________
24. ‫ے‬5 & ‫ے‬4 are _________________________
5
6
7
25. ‫ے‬8 & ‫ے‬4 are _________________________
26. ‫ے‬1 and ‫ے‬5 are ________________________
27. ‫ے‬1 & ‫ے‬8 are _________________________
28. ‫ے‬2 & ‫ے‬7 are _________________________
29. ‫ے‬7 & ‫ے‬6 are _________________________
30. ‫ے‬2 & ‫ے‬6 are _________________________
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