| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
If the base of this triangle is 5 and the height is 5, what is the area?
| 12\(\frac{1}{2}\) | |
| 84 | |
| 27\(\frac{1}{2}\) | |
| 49 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 5 x 5 = \( \frac{25}{2} \) = 12\(\frac{1}{2}\)
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
lw x wh + lh |
|
h2 x l2 x w2 |
|
2lw x 2wh + 2lh |
|
h x l x w |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.
Solve for x:
-5x + 4 < \( \frac{x}{-9} \)
| x < \(\frac{9}{11}\) | |
| x < -2\(\frac{2}{3}\) | |
| x < -1\(\frac{5}{13}\) | |
| x < -4\(\frac{4}{11}\) |
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.
-5x + 4 < \( \frac{x}{-9} \)
-9 x (-5x + 4) < x
(-9 x -5x) + (-9 x 4) < x
45x - 36 < x
45x - 36 - x < 0
45x - x < 36
44x < 36
x < \( \frac{36}{44} \)
x < \(\frac{9}{11}\)
If angle a = 20° and angle b = 36° what is the length of angle c?
| 97° | |
| 61° | |
| 64° | |
| 124° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 20° - 36° = 124°
What is 9a + 8a?
| a2 | |
| 17a2 | |
| 17a | |
| 17 |
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.
9a + 8a = 17a