| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.56 |
| Score | 0% | 71% |
A(n) __________ is two expressions separated by an equal sign.
problem |
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equation |
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formula |
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expression |
An equation is two expressions separated by an equal sign. The key to solving equations is to 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.
If a = c = 3, b = d = 1, what is the area of this rectangle?
| 3 | |
| 2 | |
| 24 | |
| 35 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 3 x 1
a = 3
Breaking apart a quadratic expression into a pair of binomials is called:
squaring |
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factoring |
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normalizing |
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deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
What is the area of a circle with a radius of 5?
| 25π | |
| 16π | |
| 6π | |
| 2π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
Solve for b:
-4b - 8 < 5 - 3b
| b < -3 | |
| b < -\(\frac{5}{9}\) | |
| b < -13 | |
| b < -\(\frac{1}{2}\) |
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 < sign and the answer on the other.
-4b - 8 < 5 - 3b
-4b < 5 - 3b + 8
-4b + 3b < 5 + 8
-b < 13
b < \( \frac{13}{-1} \)
b < -13