| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
What is 5a - 3a?
| 8 | |
| 15a | |
| 2a2 | |
| 2a |
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.
5a - 3a = 2a
If a = c = 6, b = d = 8, what is the area of this rectangle?
| 18 | |
| 48 | |
| 24 | |
| 40 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 6 x 8
a = 48
For this diagram, the Pythagorean theorem states that b2 = ?
c2 - a2 |
|
c2 + a2 |
|
a2 - c2 |
|
c - a |
The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)
A coordinate grid is composed of which of the following?
x-axis |
|
origin |
|
all of these |
|
y-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
If the base of this triangle is 3 and the height is 6, what is the area?
| 9 | |
| 42 | |
| 38\(\frac{1}{2}\) | |
| 36 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 3 x 6 = \( \frac{18}{2} \) = 9