| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
What is the area of a circle with a radius of 4?
| 4π | |
| 16π | |
| 81π | |
| 3π |
The formula for area is πr2:
a = πr2
a = π(42)
a = 16π
Simplify (5a)(7ab) - (8a2)(6b).
| 168a2b | |
| 13ab2 | |
| -13a2b | |
| 83ab2 |
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.
(5a)(7ab) - (8a2)(6b)
(5 x 7)(a x a x b) - (8 x 6)(a2 x b)
(35)(a1+1 x b) - (48)(a2b)
35a2b - 48a2b
-13a2b
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
|
deconstructing |
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factoring |
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squaring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
If the length of AB equals the length of BD, point B __________ this line segment.
midpoints |
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bisects |
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trisects |
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intersects |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
If AD = 14 and BD = 10, AB = ?
| 4 | |
| 18 | |
| 15 | |
| 5 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BD