| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.49 |
| Score | 0% | 70% |
Solve for y:
-9y - 5 = 4 - 4y
| -\(\frac{4}{5}\) | |
| -1\(\frac{4}{5}\) | |
| 1\(\frac{1}{7}\) | |
| -1\(\frac{3}{4}\) |
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.
-9y - 5 = 4 - 4y
-9y = 4 - 4y + 5
-9y + 4y = 4 + 5
-5y = 9
y = \( \frac{9}{-5} \)
y = -1\(\frac{4}{5}\)
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
|
factoring |
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squaring |
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deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
What is 2a - 2a?
| 2 | |
| 4a | |
| 4a2 | |
| 0a |
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 - 2a = 0a
A coordinate grid is composed of which of the following?
y-axis |
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all of these |
|
origin |
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x-axis |
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.
Solve for z:
4z + 4 = \( \frac{z}{-1} \)
| -\(\frac{4}{5}\) | |
| \(\frac{24}{49}\) | |
| -1\(\frac{1}{20}\) | |
| \(\frac{3}{16}\) |
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.
4z + 4 = \( \frac{z}{-1} \)
-1 x (4z + 4) = z
(-1 x 4z) + (-1 x 4) = z
-4z - 4 = z
-4z - 4 - z = 0
-4z - z = 4
-5z = 4
z = \( \frac{4}{-5} \)
z = -\(\frac{4}{5}\)