| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
What is 6a9 - 3a9?
| 3 | |
| 18a9 | |
| 3a9 | |
| 9 |
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.
6a9 - 3a9 = 3a9
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Odd |
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Inside |
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Last |
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First |
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.
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
obtuse, acute |
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supplementary, vertical |
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vertical, supplementary |
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acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
The dimensions of this trapezoid are a = 5, b = 4, c = 7, d = 7, and h = 4. What is the area?
| 22 | |
| 15 | |
| 12\(\frac{1}{2}\) | |
| 18 |
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(4 + 7)(4)
a = ½(11)(4)
a = ½(44) = \( \frac{44}{2} \)
a = 22
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h |
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π r2h2 |
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2(π r2) + 2π rh |
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4π r2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.