| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
The dimensions of this trapezoid are a = 6, b = 2, c = 9, d = 2, and h = 5. What is the area?
| 17 | |
| 10 | |
| 9 | |
| 10\(\frac{1}{2}\) |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(2 + 2)(5)
a = ½(4)(5)
a = ½(20) = \( \frac{20}{2} \)
a = 10
What is 3a - 6a?
| -3a2 | |
| -3a | |
| 18a | |
| 9a2 |
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.
3a - 6a = -3a
On this circle, line segment AB is the:
radius |
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diameter |
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chord |
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circumference |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
Breaking apart a quadratic expression into a pair of binomials is called:
squaring |
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factoring |
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deconstructing |
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normalizing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
What is the circumference of a circle with a diameter of 13?
| 10π | |
| 12π | |
| 18π | |
| 13π |
The formula for circumference is circle diameter x π:
c = πd
c = 13π