1.Order the numbers from least to greatest. –3, –8, |–6|, 2
A 2, |–6|, –8, –3
B –3, –8, 2, |–6|
C –8, |–6|, –3, 2*****
D –8, –3, 2, |–6|
2. Determine the sign of your answer, then find the SUM or DIFFERENCE
(-10)+1
-9
-11
9
11
3.Determine the sign of your answer, then find the SUM or DIFFERENCE.
7-(8)
–15
–1
1
4.15At noon, the temperature was 12º. It rose 8º during the aernoon, and then dropped 28º by midnight.
What was the temperature at midnight?
–18º
–8º
6º
50
5. Determine the sign of your answer, then find the PRODUCT or QUOTIENT. (-6).(-4)
–24
–10
6. Determine the sign of your answer, then find the PRODUCT or QUOTIENT. (63)/ (-7)
–70
–9
9
70
7.determine the sign of your answer, then find the PRODUCT or QUOTIENT. 72/(8)
-12
–9
9
12
8. Due to evaporation, the water level in Wesley's aquarium dropped 2 cm a week during the first three
weeks in July. What integer represents the change in water level during the three-week period?
–2 cm
–3 cm
–6 cm
–9 cm
i will do 9 myself i only need help with 8
Number 3 is wrong it's 15
The integer that represents the change in water level during the three-week period is -6 cm.
To answer question 8, we can follow these steps:
Step 1: Determine the change in water level per week.
Given that the water level dropped 2 cm per week during the first three weeks in July, the change in water level per week is -2 cm.
Step 2: Determine the duration of the period.
The period mentioned in the question is three weeks.
Step 3: Calculate the overall change in water level.
To find the overall change, we multiply the change in water level per week by the duration of the period.
-2 cm/week * 3 weeks = -6 cm.
Therefore, the integer that represents the change in water level during the three-week period is -6 cm.
1.
wrong answer
| – 6 | = 6
correct answer is D
- 8 , - 3 , 2 , | – 6 |
2.
10 is greater than 1, so - 10 + 1 will have a sign that has a larger number, in this case a negative sign.
- 10 + 1 = 1 - 10 = - 9
3.
8 is greater than 7, so 7 - 8 will have a sign that has a larger number, in this case a negative sign.
7 - 8 = - 1
4.
To find the temperature by midnight, you would start from 12 and since it rose, you would add 8 to 12 which would give you 20.
Then since it dropped by 28, you would subtract 20 by 28 which would give you - 8.
This means that the temperature by midnight would be - 8°.
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Remark for questions 5 , 6 and 7:
When you multiply or divide two numbers
then two like signs make a positive sign.
Two unlike signs make a negative sign.
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5.
Multiplying two negative numbers make a positive sign.
( - 6 ) ∙ ( - 4 ) = 24
6.
Divide positive and negative numbers make a negative sign.
( 63 ) / ( - 7 ) = - 9
7.
Divide positive and positive number make a positive sign.
72 / 8 = 9
8.
Water dropped 2 cm a week during the first three weeks mean:
- 2 cm ∙ 3 = - 6 cm