| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.69 |
| Score | 0% | 74% |
What is 7a - 7a?
| 49a | |
| a2 | |
| 0a | |
| 14a2 |
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.
7a - 7a = 0a
A coordinate grid is composed of which of the following?
x-axis |
|
origin |
|
y-axis |
|
all of these |
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.
Simplify 7a x 2b.
| 14\( \frac{b}{a} \) | |
| 14ab | |
| 14a2b2 | |
| 14\( \frac{a}{b} \) |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
7a x 2b = (7 x 2) (a x b) = 14ab
The dimensions of this cube are height (h) = 2, length (l) = 9, and width (w) = 6. What is the volume?
| 24 | |
| 162 | |
| 108 | |
| 224 |
The volume of a cube is height x length x width:
v = h x l x w
v = 2 x 9 x 6
v = 108
Solve -3a - 9a = -4a - 2y + 1 for a in terms of y.
| -2\(\frac{2}{3}\)y + 1\(\frac{1}{3}\) | |
| -\(\frac{1}{15}\)y + \(\frac{1}{15}\) | |
| \(\frac{1}{8}\)y + \(\frac{1}{2}\) | |
| 7y + 1 |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
-3a - 9y = -4a - 2y + 1
-3a = -4a - 2y + 1 + 9y
-3a + 4a = -2y + 1 + 9y
a = 7y + 1