| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.55 |
| Score | 0% | 71% |
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h2 |
|
2(π r2) + 2π rh |
|
π r2h |
|
4π r2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
The dimensions of this cube are height (h) = 4, length (l) = 9, and width (w) = 4. What is the volume?
| 125 | |
| 144 | |
| 90 | |
| 120 |
The volume of a cube is height x length x width:
v = h x l x w
v = 4 x 9 x 4
v = 144
What is 7a2 + 2a2?
| 5 | |
| 9a4 | |
| 9a2 | |
| 14a2 |
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.
7a2 + 2a2 = 9a2
What is 5a8 - 8a8?
| 40a16 | |
| 13a16 | |
| -3a8 | |
| 13 |
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.
5a8 - 8a8 = -3a8
Breaking apart a quadratic expression into a pair of binomials is called:
squaring |
|
deconstructing |
|
factoring |
|
normalizing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.