| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
The dimensions of this cube are height (h) = 6, length (l) = 2, and width (w) = 2. What is the volume?
| 12 | |
| 32 | |
| 60 | |
| 24 |
The volume of a cube is height x length x width:
v = h x l x w
v = 6 x 2 x 2
v = 24
Solve for c:
5c - 8 > \( \frac{c}{-1} \)
| c > 7\(\frac{1}{5}\) | |
| c > \(\frac{12}{13}\) | |
| c > 1\(\frac{1}{3}\) | |
| c > -\(\frac{8}{23}\) |
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.
5c - 8 > \( \frac{c}{-1} \)
-1 x (5c - 8) > c
(-1 x 5c) + (-1 x -8) > c
-5c + 8 > c
-5c + 8 - c > 0
-5c - c > -8
-6c > -8
c > \( \frac{-8}{-6} \)
c > 1\(\frac{1}{3}\)
What is 2a + 7a?
| 9 | |
| 9a | |
| 9a2 | |
| 14a |
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.
2a + 7a = 9a
Which of the following statements about math operations is incorrect?
you can subtract monomials that have the same variable and the same exponent |
|
you can multiply monomials that have different variables and different exponents |
|
you can add monomials that have the same variable and the same exponent |
|
all of these statements are correct |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
If the base of this triangle is 4 and the height is 1, what is the area?
| 35 | |
| 32\(\frac{1}{2}\) | |
| 36 | |
| 2 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 1 = \( \frac{4}{2} \) = 2