| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
a(b + c) = ab + ac defines which of the following?
commutative property for division |
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distributive property for division |
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commutative property for multiplication |
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distributive 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.
If there were a total of 200 raffle tickets sold and you bought 14 tickets, what's the probability that you'll win the raffle?
| 7% | |
| 18% | |
| 6% | |
| 8% |
You have 14 out of the total of 200 raffle tickets sold so you have a (\( \frac{14}{200} \)) x 100 = \( \frac{14 \times 100}{200} \) = \( \frac{1400}{200} \) = 7% chance to win the raffle.
What is \( \frac{5}{4} \) + \( \frac{2}{6} \)?
| 1\(\frac{7}{12}\) | |
| \( \frac{4}{12} \) | |
| 1 \( \frac{7}{12} \) | |
| 2 \( \frac{9}{12} \) |
To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 4 are [4, 8, 12, 16, 20, 24, 28, 32, 36, 40] and the first few multiples of 6 are [6, 12, 18, 24, 30, 36, 42, 48, 54, 60]. The first few multiples they share are [12, 24, 36, 48, 60] making 12 the smallest multiple 4 and 6 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{5 x 3}{4 x 3} \) + \( \frac{2 x 2}{6 x 2} \)
\( \frac{15}{12} \) + \( \frac{4}{12} \)
Now, because the fractions share a common denominator, you can add them:
\( \frac{15 + 4}{12} \) = \( \frac{19}{12} \) = 1\(\frac{7}{12}\)
Which of the following is an improper fraction?
\({2 \over 5} \) |
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\({a \over 5} \) |
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\(1 {2 \over 5} \) |
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\({7 \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
Which of the following is a mixed number?
\({a \over 5} \) |
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\({5 \over 7} \) |
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\({7 \over 5} \) |
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\(1 {2 \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.