| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.67 |
| Score | 0% | 73% |
a(b + c) = ab + ac 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 multiplication helps in solving expressions like a(b + c). It specifies that the result of multiplying one number by the sum or difference of two numbers can be obtained by multiplying each number individually and then totaling the results: a(b + c) = ab + ac. For example, 4(10-5) = (4 x 10) - (4 x 5) = 40 - 20 = 20.
What is the distance in miles of a trip that takes 5 hours at an average speed of 65 miles per hour?
| 175 miles | |
| 125 miles | |
| 325 miles | |
| 200 miles |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Solving for distance:
distance = \( \text{speed} \times \text{time} \)
distance = \( 65mph \times 5h \)
325 miles
What is \( \frac{1}{8} \) x \( \frac{1}{7} \)?
| \(\frac{1}{40}\) | |
| \(\frac{9}{35}\) | |
| \(\frac{1}{56}\) | |
| \(\frac{1}{7}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{8} \) x \( \frac{1}{7} \) = \( \frac{1 x 1}{8 x 7} \) = \( \frac{1}{56} \) = \(\frac{1}{56}\)
If there were a total of 300 raffle tickets sold and you bought 18 tickets, what's the probability that you'll win the raffle?
| 16% | |
| 6% | |
| 13% | |
| 15% |
You have 18 out of the total of 300 raffle tickets sold so you have a (\( \frac{18}{300} \)) x 100 = \( \frac{18 \times 100}{300} \) = \( \frac{1800}{300} \) = 6% chance to win the raffle.
Find the average of the following numbers: 10, 2, 8, 4.
| 8 | |
| 1 | |
| 3 | |
| 6 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{10 + 2 + 8 + 4}{4} \) = \( \frac{24}{4} \) = 6