| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
If \( \left|b - 1\right| \) - 1 = 5, which of these is a possible value for b?
| 2 | |
| -8 | |
| -3 | |
| -5 |
First, solve for \( \left|b - 1\right| \):
\( \left|b - 1\right| \) - 1 = 5
\( \left|b - 1\right| \) = 5 + 1
\( \left|b - 1\right| \) = 6
The value inside the absolute value brackets can be either positive or negative so (b - 1) must equal + 6 or -6 for \( \left|b - 1\right| \) to equal 6:
| b - 1 = 6 b = 6 + 1 b = 7 | b - 1 = -6 b = -6 + 1 b = -5 |
So, b = -5 or b = 7.
The __________ is the smallest positive integer that is a multiple of two or more integers.
absolute value |
|
greatest common factor |
|
least common multiple |
|
least common factor |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.
Which of these numbers is a factor of 72?
| 76 | |
| 49 | |
| 36 | |
| 22 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72.
What is \( \sqrt{\frac{16}{16}} \)?
| \(\frac{4}{9}\) | |
| \(\frac{1}{3}\) | |
| 1 | |
| \(\frac{2}{3}\) |
To take the square root of a fraction, break the fraction into two separate roots then calculate the square root of the numerator and denominator separately:
\( \sqrt{\frac{16}{16}} \)
\( \frac{\sqrt{16}}{\sqrt{16}} \)
\( \frac{\sqrt{4^2}}{\sqrt{4^2}} \)
1
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 40% off." If Bob buys two shirts, each with a regular price of $29, how much will he pay for both shirts?
| $31.90 | |
| $36.25 | |
| $46.40 | |
| $39.15 |
By buying two shirts, Bob will save $29 x \( \frac{40}{100} \) = \( \frac{$29 x 40}{100} \) = \( \frac{$1160}{100} \) = $11.60 on the second shirt.
So, his total cost will be
$29.00 + ($29.00 - $11.60)
$29.00 + $17.40
$46.40