| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Convert x-4 to remove the negative exponent.
| \( \frac{1}{x^4} \) | |
| \( \frac{-1}{-4x^{4}} \) | |
| \( \frac{4}{x} \) | |
| \( \frac{-4}{-x} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
What is -z7 - 7z7?
| -8z7 | |
| 6z-14 | |
| 6z7 | |
| -8z-7 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-1z7 - 7z7
(-1 - 7)z7
-8z7
Convert 1,726,000 to scientific notation.
| 0.173 x 107 | |
| 1.726 x 106 | |
| 1.726 x 105 | |
| 1.726 x 10-5 |
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:
1,726,000 in scientific notation is 1.726 x 106
Which of these numbers is a factor of 32?
| 26 | |
| 4 | |
| 6 | |
| 28 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 32 are 1, 2, 4, 8, 16, 32.
4! = ?
4 x 3 x 2 x 1 |
|
3 x 2 x 1 |
|
4 x 3 |
|
5 x 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.