| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
The dimensions of this trapezoid are a = 6, b = 9, c = 7, d = 8, and h = 4. What is the area?
| 13 | |
| 34 | |
| 16\(\frac{1}{2}\) | |
| 22 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(9 + 8)(4)
a = ½(17)(4)
a = ½(68) = \( \frac{68}{2} \)
a = 34
The dimensions of this cylinder are height (h) = 4 and radius (r) = 4. What is the surface area?
| 64π | |
| 130π | |
| 180π | |
| 40π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(42) + 2π(4 x 4)
sa = 2π(16) + 2π(16)
sa = (2 x 16)π + (2 x 16)π
sa = 32π + 32π
sa = 64π
If a = c = 9, b = d = 5, what is the area of this rectangle?
| 45 | |
| 18 | |
| 72 | |
| 7 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 9 x 5
a = 45
If a = 5, b = 1, c = 7, and d = 9, what is the perimeter of this quadrilateral?
| 7 | |
| 14 | |
| 24 | |
| 22 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 5 + 1 + 7 + 9
p = 22
Breaking apart a quadratic expression into a pair of binomials is called:
squaring |
|
normalizing |
|
deconstructing |
|
factoring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.