| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
What is 6a - 7a?
| 42a2 | |
| 42a | |
| -1a | |
| -a2 |
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 - 7a = -1a
If a = 1, b = 4, c = 4, and d = 2, what is the perimeter of this quadrilateral?
| 29 | |
| 11 | |
| 15 | |
| 25 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 1 + 4 + 4 + 2
p = 11
The dimensions of this cube are height (h) = 2, length (l) = 7, and width (w) = 4. What is the surface area?
| 280 | |
| 100 | |
| 158 | |
| 70 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 7 x 4) + (2 x 4 x 2) + (2 x 7 x 2)
sa = (56) + (16) + (28)
sa = 100
A(n) __________ is to a parallelogram as a square is to a rectangle.
rhombus |
|
trapezoid |
|
quadrilateral |
|
triangle |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
The dimensions of this cylinder are height (h) = 2 and radius (r) = 4. What is the volume?
| 36π | |
| 729π | |
| 32π | |
| 405π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(42 x 2)
v = 32π