| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.73 |
| Score | 0% | 75% |
If a = c = 5, b = d = 8, what is the area of this rectangle?
| 16 | |
| 5 | |
| 40 | |
| 56 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 5 x 8
a = 40
What is 5a4 + 7a4?
| 12a4 | |
| -2a8 | |
| -2 | |
| 35a8 |
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.
5a4 + 7a4 = 12a4
If a = 2, b = 1, c = 1, and d = 6, what is the perimeter of this quadrilateral?
| 10 | |
| 25 | |
| 19 | |
| 22 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 2 + 1 + 1 + 6
p = 10
Which of the following statements about a triangle is not true?
sum of interior angles = 180° |
|
area = ½bh |
|
exterior angle = sum of two adjacent interior angles |
|
perimeter = sum of side lengths |
A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
|
deconstructing |
|
factoring |
|
squaring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.