| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
If \( \left|x + 7\right| \) - 2 = -2, which of these is a possible value for x?
| -1 | |
| -7 | |
| 5 | |
| 8 |
First, solve for \( \left|x + 7\right| \):
\( \left|x + 7\right| \) - 2 = -2
\( \left|x + 7\right| \) = -2 + 2
\( \left|x + 7\right| \) = 0
The value inside the absolute value brackets can be either positive or negative so (x + 7) must equal + 0 or -0 for \( \left|x + 7\right| \) to equal 0:
| x + 7 = 0 x = 0 - 7 x = -7 | x + 7 = 0 x = 0 - 7 x = -7 |
So, x = -7 or x = -7.
Which of the following is not an integer?
-1 |
|
\({1 \over 2}\) |
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1 |
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0 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
The __________ is the greatest factor that divides two integers.
greatest common factor |
|
least common multiple |
|
greatest common multiple |
|
absolute value |
The greatest common factor (GCF) is the greatest factor that divides two integers.
\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?
commutative property for multiplication |
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distributive property for division |
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distributive property for multiplication |
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commutative property for division |
The distributive property for division helps in solving expressions like \({b + c \over a}\). It specifies that the result of dividing a fraction with multiple terms in the numerator and one term in the denominator can be obtained by dividing each term individually and then totaling the results: \({b + c \over a} = {b \over a} + {c \over a}\). For example, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).
How many 12-passenger vans will it take to drive all 51 members of the football team to an away game?
| 12 vans | |
| 4 vans | |
| 5 vans | |
| 6 vans |
Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:
vans = \( \frac{51}{12} \) = 4\(\frac{1}{4}\)
So, it will take 4 full vans and one partially full van to transport the entire team making a total of 5 vans.