| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Solve for x:
-x - 3 = \( \frac{x}{-7} \)
| 7\(\frac{1}{2}\) | |
| -\(\frac{7}{12}\) | |
| -\(\frac{63}{71}\) | |
| -3\(\frac{1}{2}\) |
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.
-x - 3 = \( \frac{x}{-7} \)
-7 x (-x - 3) = x
(-7 x -x) + (-7 x -3) = x
7x + 21 = x
7x + 21 - x = 0
7x - x = -21
6x = -21
x = \( \frac{-21}{6} \)
x = -3\(\frac{1}{2}\)
Breaking apart a quadratic expression into a pair of binomials is called:
deconstructing |
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squaring |
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normalizing |
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factoring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Last |
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First |
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Inside |
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Odd |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.
Solve for b:
-5b - 2 = 8 + 5b
| -1 | |
| -\(\frac{1}{6}\) | |
| \(\frac{1}{3}\) | |
| -2 |
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.
-5b - 2 = 8 + 5b
-5b = 8 + 5b + 2
-5b - 5b = 8 + 2
-10b = 10
b = \( \frac{10}{-10} \)
b = -1
If side x = 7cm, side y = 9cm, and side z = 7cm what is the perimeter of this triangle?
| 29cm | |
| 23cm | |
| 31cm | |
| 38cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 7cm + 9cm + 7cm = 23cm