| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.98 |
| Score | 0% | 60% |
Which of the following expressions contains exactly two terms?
binomial |
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monomial |
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polynomial |
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quadratic |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
Which of the following statements about a triangle is not true?
sum of interior angles = 180° |
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perimeter = sum of side lengths |
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area = ½bh |
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exterior angle = sum of two adjacent interior angles |
A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.
Solve 8b - 5b = -3b + 9x - 7 for b in terms of x.
| -3\(\frac{1}{2}\)x + 3 | |
| 1\(\frac{3}{11}\)x - \(\frac{7}{11}\) | |
| 1\(\frac{2}{3}\)x + 1\(\frac{1}{2}\) | |
| \(\frac{5}{9}\)x + \(\frac{7}{9}\) |
To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.
8b - 5x = -3b + 9x - 7
8b = -3b + 9x - 7 + 5x
8b + 3b = 9x - 7 + 5x
11b = 14x - 7
b = \( \frac{14x - 7}{11} \)
b = \( \frac{14x}{11} \) + \( \frac{-7}{11} \)
b = 1\(\frac{3}{11}\)x - \(\frac{7}{11}\)
What is the area of a circle with a radius of 5?
| 25π | |
| 7π | |
| 4π | |
| 81π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
A cylinder with a radius (r) and a height (h) has a surface area of:
2(π r2) + 2π rh |
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π r2h |
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4π r2 |
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π r2h2 |
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.