| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
If \(\left|a\right| = 7\), which of the following best describes a?
none of these is correct |
|
a = 7 |
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a = -7 |
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a = 7 or 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).
The __________ is the greatest factor that divides two integers.
greatest common factor |
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greatest common multiple |
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least common multiple |
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absolute value |
The greatest common factor (GCF) is the greatest factor that divides two integers.
What is \( \frac{2z^9}{8z^4} \)?
| \(\frac{1}{4}\)z36 | |
| 4z5 | |
| \(\frac{1}{4}\)z\(\frac{4}{9}\) | |
| \(\frac{1}{4}\)z5 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{2z^9}{8z^4} \)
\( \frac{2}{8} \) z(9 - 4)
\(\frac{1}{4}\)z5
Which of the following is not a prime number?
2 |
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9 |
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5 |
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7 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 15% off." If Roger buys two shirts, each with a regular price of $30, how much money will he save?
| $15.00 | |
| $4.50 | |
| $12.00 | |
| 97 |
By buying two shirts, Roger will save $30 x \( \frac{15}{100} \) = \( \frac{$30 x 15}{100} \) = \( \frac{$450}{100} \) = $4.50 on the second shirt.