| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.67 |
| Score | 0% | 73% |
The __________ is the smallest positive integer that is a multiple of two or more integers.
absolute value |
|
least common factor |
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least common multiple |
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greatest common factor |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.
What is -3c4 + 4c4?
| -7c4 | |
| c4 | |
| c16 | |
| -7c-4 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so add the coefficients and retain the base and exponent:
-3c4 + 4c4
(-3 + 4)c4
c4
What is (b5)4?
| 4b5 | |
| b20 | |
| b | |
| b9 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(b5)44! = ?
4 x 3 |
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3 x 2 x 1 |
|
5 x 4 x 3 x 2 x 1 |
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4 x 3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
How many hours does it take a car to travel 455 miles at an average speed of 65 miles per hour?
| 8 hours | |
| 7 hours | |
| 9 hours | |
| 6 hours |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Solving for time:
time = \( \frac{\text{distance}}{\text{speed}} \)
time = \( \frac{455mi}{65mph} \)
7 hours