| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
If \(\left|a\right| = 7\), which of the following best describes a?
a = -7 |
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a = 7 or a = -7 |
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none of these is correct |
|
a = 7 |
The absolute value is the positive magnitude of a particular number or variable and is indicated by two vertical lines: \(\left|-5\right| = 5\). In the case of a variable absolute value (\(\left|a\right| = 5\)) the value of a can be either positive or negative (a = -5 or a = 5).
Bob loaned Damon $400 at an annual interest rate of 3%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $14 | |
| $30 | |
| $135 | |
| $12 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $400
i = 0.03 x $400
i = $12
What is \( \frac{18\sqrt{49}}{6\sqrt{7}} \)?
| 3 \( \sqrt{7} \) | |
| 7 \( \sqrt{\frac{1}{3}} \) | |
| \(\frac{1}{3}\) \( \sqrt{\frac{1}{7}} \) | |
| \(\frac{1}{3}\) \( \sqrt{7} \) |
To divide terms with radicals, divide the coefficients and radicands separately:
\( \frac{18\sqrt{49}}{6\sqrt{7}} \)
\( \frac{18}{6} \) \( \sqrt{\frac{49}{7}} \)
3 \( \sqrt{7} \)
Which of the following is not an integer?
1 |
|
0 |
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-1 |
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\({1 \over 2}\) |
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 smallest positive integer that is a multiple of two or more integers.
least common factor |
|
absolute value |
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greatest common factor |
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least common multiple |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.