| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
If the base of this triangle is 4 and the height is 9, what is the area?
| 18 | |
| 49 | |
| 42 | |
| 58\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 9 = \( \frac{36}{2} \) = 18
Solve for c:
-6c - 2 = -7 + 8c
| \(\frac{3}{5}\) | |
| 1\(\frac{1}{7}\) | |
| -\(\frac{3}{8}\) | |
| \(\frac{5}{14}\) |
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 equal sign and the answer on the other.
-6c - 2 = -7 + 8c
-6c = -7 + 8c + 2
-6c - 8c = -7 + 2
-14c = -5
c = \( \frac{-5}{-14} \)
c = \(\frac{5}{14}\)
What is 9a9 + 4a9?
| 36a9 | |
| 13a9 | |
| 5 | |
| 5a18 |
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.
9a9 + 4a9 = 13a9
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
2lw x 2wh + 2lh |
|
h x l x w |
|
lw x wh + lh |
|
h2 x l2 x w2 |
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.
What is the circumference of a circle with a radius of 5?
| 14π | |
| 16π | |
| 10π | |
| 18π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 5)
c = 10π