| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
This property states taht the order of addition or multiplication does not mater. For example, 2 + 5 and 5 + 2 are equivalent.
associative |
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PEDMAS |
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distributive |
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commutative |
The commutative property states that, when adding or multiplying numbers, the order in which they're added or multiplied does not matter. For example, 3 + 4 and 4 + 3 give the same result, as do 3 x 4 and 4 x 3.
What is the next number in this sequence: 1, 4, 10, 19, 31, __________ ?
| 39 | |
| 50 | |
| 46 | |
| 43 |
The equation for this sequence is:
an = an-1 + 3(n - 1)
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 3(6 - 1)
a6 = 31 + 3(5)
a6 = 46
What is 3\( \sqrt{3} \) x 7\( \sqrt{5} \)?
| 21\( \sqrt{15} \) | |
| 21\( \sqrt{3} \) | |
| 21\( \sqrt{8} \) | |
| 10\( \sqrt{5} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
3\( \sqrt{3} \) x 7\( \sqrt{5} \)
(3 x 7)\( \sqrt{3 \times 5} \)
21\( \sqrt{15} \)
10 members of a bridal party need transported to a wedding reception but there are only 3 3-passenger taxis available to take them. How many will need to find other transportation?
| 1 | |
| 3 | |
| 2 | |
| 9 |
There are 3 3-passenger taxis available so that's 3 x 3 = 9 total seats. There are 10 people needing transportation leaving 10 - 9 = 1 who will have to find other transportation.
Convert 0.0007088 to scientific notation.
| 0.709 x 10-3 | |
| 7.088 x 10-4 | |
| 7.088 x 104 | |
| 7.088 x 105 |
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:
0.0007088 in scientific notation is 7.088 x 10-4