| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.50 |
| Score | 0% | 70% |
What is -8a5 x 5a2?
| -40a7 | |
| -40a10 | |
| -40a-3 | |
| -3a7 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
-8a5 x 5a2
(-8 x 5)a(5 + 2)
-40a7
The __________ is the smallest positive integer that is a multiple of two or more integers.
greatest common factor |
|
least common multiple |
|
least common factor |
|
absolute value |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.
Which of the following is a mixed number?
\({7 \over 5} \) |
|
\(1 {2 \over 5} \) |
|
\({5 \over 7} \) |
|
\({a \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
Convert c-5 to remove the negative exponent.
| \( \frac{-1}{-5c} \) | |
| \( \frac{1}{c^5} \) | |
| \( \frac{-1}{c^{-5}} \) | |
| \( \frac{-5}{-c} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
What is -7x5 - 9x5?
| 2x10 | |
| -16x5 | |
| 2x5 | |
| 2x25 |
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:
-7x5 - 9x5
(-7 - 9)x5
-16x5