| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.85 |
| Score | 0% | 57% |
What is \( 6 \)\( \sqrt{175} \) + \( 3 \)\( \sqrt{7} \)
| 33\( \sqrt{7} \) | |
| 9\( \sqrt{1225} \) | |
| 18\( \sqrt{1225} \) | |
| 18\( \sqrt{7} \) |
To add these radicals together their radicands must be the same:
6\( \sqrt{175} \) + 3\( \sqrt{7} \)
6\( \sqrt{25 \times 7} \) + 3\( \sqrt{7} \)
6\( \sqrt{5^2 \times 7} \) + 3\( \sqrt{7} \)
(6)(5)\( \sqrt{7} \) + 3\( \sqrt{7} \)
30\( \sqrt{7} \) + 3\( \sqrt{7} \)
Now that the radicands are identical, you can add them together:
30\( \sqrt{7} \) + 3\( \sqrt{7} \)\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?
distributive property for multiplication |
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distributive property for division |
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commutative 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, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).
What is \( \sqrt{\frac{25}{16}} \)?
| \(\frac{4}{5}\) | |
| 2 | |
| 1\(\frac{1}{4}\) | |
| \(\frac{2}{3}\) |
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:
\( \sqrt{\frac{25}{16}} \)
\( \frac{\sqrt{25}}{\sqrt{16}} \)
\( \frac{\sqrt{5^2}}{\sqrt{4^2}} \)
\( \frac{5}{4} \)
1\(\frac{1}{4}\)
Which of the following statements about exponents is false?
b1 = b |
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b0 = 1 |
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b1 = 1 |
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all of these are false |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).
What is (y3)4?
| y12 | |
| y | |
| y-1 | |
| 4y3 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(y3)4