| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.49 |
| Score | 0% | 70% |
What is 3a7 - 7a7?
| -4a7 | |
| 21a14 | |
| 10a14 | |
| -4a14 |
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.
3a7 - 7a7 = -4a7
A cylinder with a radius (r) and a height (h) has a surface area of:
4π r2 |
|
2(π r2) + 2π rh |
|
π r2h |
|
π r2h2 |
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.
Breaking apart a quadratic expression into a pair of binomials is called:
deconstructing |
|
factoring |
|
normalizing |
|
squaring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
The dimensions of this cube are height (h) = 8, length (l) = 9, and width (w) = 4. What is the volume?
| 27 | |
| 288 | |
| 16 | |
| 36 |
The volume of a cube is height x length x width:
v = h x l x w
v = 8 x 9 x 4
v = 288
The dimensions of this cylinder are height (h) = 1 and radius (r) = 9. What is the volume?
| 320π | |
| 32π | |
| 81π | |
| 54π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(92 x 1)
v = 81π