| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
The dimensions of this cylinder are height (h) = 5 and radius (r) = 5. What is the volume?
| 16π | |
| 175π | |
| 343π | |
| 125π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(52 x 5)
v = 125π
What is 4a3 + 9a3?
| 13a6 | |
| a36 | |
| -5a6 | |
| 13a3 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
4a3 + 9a3 = 13a3
If the base of this triangle is 4 and the height is 6, what is the area?
| 84 | |
| 39 | |
| 75 | |
| 12 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 6 = \( \frac{24}{2} \) = 12
What is 6a3 - 7a3?
| 13a6 | |
| 13 | |
| -1a3 | |
| 42a3 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
6a3 - 7a3 = -1a3
What is 6a + 3a?
| 9a | |
| a2 | |
| 3a2 | |
| 9 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
6a + 3a = 9a