| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?
commutative property for division |
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distributive property for multiplication |
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distributive property for division |
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commutative property for multiplication |
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, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).
If \( \left|b + 2\right| \) + 8 = 2, which of these is a possible value for b?
| 3 | |
| -19 | |
| -8 | |
| -10 |
First, solve for \( \left|b + 2\right| \):
\( \left|b + 2\right| \) + 8 = 2
\( \left|b + 2\right| \) = 2 - 8
\( \left|b + 2\right| \) = -6
The value inside the absolute value brackets can be either positive or negative so (b + 2) must equal - 6 or --6 for \( \left|b + 2\right| \) to equal -6:
| b + 2 = -6 b = -6 - 2 b = -8 | b + 2 = 6 b = 6 - 2 b = 4 |
So, b = 4 or b = -8.
If the ratio of home fans to visiting fans in a crowd is 2:1 and all 33,000 seats in a stadium are filled, how many home fans are in attendance?
| 26,000 | |
| 36,750 | |
| 32,000 | |
| 22,000 |
A ratio of 2:1 means that there are 2 home fans for every one visiting fan. So, of every 3 fans, 2 are home fans and \( \frac{2}{3} \) of every fan in the stadium is a home fan:
33,000 fans x \( \frac{2}{3} \) = \( \frac{66000}{3} \) = 22,000 fans.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 50% off." If Damon buys two shirts, each with a regular price of $28, how much money will he save?
| $9.80 | |
| $11.20 | |
| $14.00 | |
| $7.00 |
By buying two shirts, Damon will save $28 x \( \frac{50}{100} \) = \( \frac{$28 x 50}{100} \) = \( \frac{$1400}{100} \) = $14.00 on the second shirt.
Which of the following is not a prime number?
2 |
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5 |
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9 |
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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.