| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
Simplify (5a)(8ab) - (5a2)(5b).
| 15a2b | |
| 130ab2 | |
| 130a2b | |
| 65a2b |
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)(8ab) - (5a2)(5b)
(5 x 8)(a x a x b) - (5 x 5)(a2 x b)
(40)(a1+1 x b) - (25)(a2b)
40a2b - 25a2b
15a2b
If the length of AB equals the length of BD, point B __________ this line segment.
bisects |
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intersects |
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midpoints |
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trisects |
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.
The dimensions of this cylinder are height (h) = 5 and radius (r) = 5. What is the volume?
| 294π | |
| 125π | |
| 1π | |
| 486π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(52 x 5)
v = 125π
Which of the following statements about a triangle is not true?
exterior angle = sum of two adjacent interior angles |
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perimeter = sum of side lengths |
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area = ½bh |
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sum of interior angles = 180° |
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.
If AD = 18 and BD = 16, AB = ?
| 8 | |
| 20 | |
| 12 | |
| 2 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BD