| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
What is -7z7 + 4z7?
| -3z49 | |
| -3z14 | |
| -11z-7 | |
| -3z7 |
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:
-7z7 + 4z7
(-7 + 4)z7
-3z7
What is -3b3 - 4b3?
| b-6 | |
| b6 | |
| b3 | |
| -7b3 |
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:
-3b3 - 4b3
(-3 - 4)b3
-7b3
Convert a-5 to remove the negative exponent.
| \( \frac{5}{a} \) | |
| \( \frac{1}{a^5} \) | |
| \( \frac{-5}{-a} \) | |
| \( \frac{-5}{a} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
What is 2z2 x 6z2?
| 12z4 | |
| 12z0 | |
| 12z2 | |
| 8z4 |
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:
2z2 x 6z2
(2 x 6)z(2 + 2)
12z4
What is \( \frac{-2a^5}{2a^4} \)?
| -a9 | |
| -a | |
| -a\(\frac{4}{5}\) | |
| -a-1 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{-2a^5}{2a^4} \)
\( \frac{-2}{2} \) a(5 - 4)
-a