| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.93 |
| Score | 0% | 59% |
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.
What is 2\( \sqrt{5} \) x 5\( \sqrt{3} \)?
| 10\( \sqrt{3} \) | |
| 7\( \sqrt{15} \) | |
| 10\( \sqrt{5} \) | |
| 10\( \sqrt{15} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
2\( \sqrt{5} \) x 5\( \sqrt{3} \)
(2 x 5)\( \sqrt{5 \times 3} \)
10\( \sqrt{15} \)
What is \( \frac{1}{7} \) x \( \frac{3}{8} \)?
| \(\frac{3}{8}\) | |
| \(\frac{3}{56}\) | |
| \(\frac{4}{63}\) | |
| \(\frac{3}{7}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{7} \) x \( \frac{3}{8} \) = \( \frac{1 x 3}{7 x 8} \) = \( \frac{3}{56} \) = \(\frac{3}{56}\)
Solve 5 + (4 + 3) ÷ 2 x 2 - 42
| -4 | |
| \(\frac{2}{3}\) | |
| 4 | |
| 1\(\frac{1}{4}\) |
Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):
5 + (4 + 3) ÷ 2 x 2 - 42
P: 5 + (7) ÷ 2 x 2 - 42
E: 5 + 7 ÷ 2 x 2 - 16
MD: 5 + \( \frac{7}{2} \) x 2 - 16
MD: 5 + \( \frac{14}{2} \) - 16
AS: \( \frac{10}{2} \) + \( \frac{14}{2} \) - 16
AS: \( \frac{24}{2} \) - 16
AS: \( \frac{24 - 32}{2} \)
\( \frac{-8}{2} \)
-4
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| 2.0 | |
| 6.4 | |
| 6.3 |
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