| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.10 |
| Score | 0% | 62% |
Solve for a:
-8a + 8 > -2 - 9a
| a > -\(\frac{2}{5}\) | |
| a > -\(\frac{2}{7}\) | |
| a > -10 | |
| a > -\(\frac{2}{3}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
-8a + 8 > -2 - 9a
-8a > -2 - 9a - 8
-8a + 9a > -2 - 8
a > -10
Order the following types of angle from least number of degrees to most number of degrees.
right, obtuse, acute |
|
acute, obtuse, right |
|
acute, right, obtuse |
|
right, acute, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
What is the area of a circle with a diameter of 10?
| 25π | |
| 49π | |
| 36π | |
| 81π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{10}{2} \)
r = 5
a = πr2
a = π(52)
a = 25π
The dimensions of this cube are height (h) = 9, length (l) = 3, and width (w) = 6. What is the surface area?
| 198 | |
| 124 | |
| 42 | |
| 222 |
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 3 x 6) + (2 x 6 x 9) + (2 x 3 x 9)
sa = (36) + (108) + (54)
sa = 198
If the base of this triangle is 5 and the height is 1, what is the area?
| 20 | |
| 2\(\frac{1}{2}\) | |
| 35 | |
| 36 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 5 x 1 = \( \frac{5}{2} \) = 2\(\frac{1}{2}\)