| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.11 |
| Score | 0% | 62% |
What is \( \frac{45\sqrt{12}}{9\sqrt{6}} \)?
| 5 \( \sqrt{\frac{1}{2}} \) | |
| 2 \( \sqrt{5} \) | |
| 5 \( \sqrt{2} \) | |
| \(\frac{1}{5}\) \( \sqrt{\frac{1}{2}} \) |
To divide terms with radicals, divide the coefficients and radicands separately:
\( \frac{45\sqrt{12}}{9\sqrt{6}} \)
\( \frac{45}{9} \) \( \sqrt{\frac{12}{6}} \)
5 \( \sqrt{2} \)
What is (z5)4?
| z20 | |
| 5z4 | |
| 4z5 | |
| z9 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(z5)4Convert 0.0008357 to scientific notation.
| 8.357 x 104 | |
| 83.57 x 10-5 | |
| 8.357 x 10-4 | |
| 8.357 x 10-3 |
A number in scientific notation has the format 0.000 x 10exponent. To convert to scientific notation, move the decimal point to the right or the left until the number is a decimal between 1 and 10. The exponent of the 10 is the number of places you moved the decimal point and is positive if you moved the decimal point to the left and negative if you moved it to the right:
0.0008357 in scientific notation is 8.357 x 10-4
\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?
commutative property for multiplication |
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distributive property for division |
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distributive property for multiplication |
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commutative property for division |
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, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).
Which of the following statements about exponents is false?
b0 = 1 |
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all of these are false |
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b1 = 1 |
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b1 = b |
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).