| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
Simplify 8a x 2b.
| 10ab | |
| 16\( \frac{a}{b} \) | |
| 16\( \frac{b}{a} \) | |
| 16ab |
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.
8a x 2b = (8 x 2) (a x b) = 16ab
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
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equilateral, isosceles and right |
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isosceles and right |
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equilateral and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
Which of the following statements about a triangle is not true?
area = ½bh |
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perimeter = sum of side lengths |
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exterior angle = sum of two adjacent interior angles |
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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 a = 7, b = 9, c = 6, and d = 6, what is the perimeter of this quadrilateral?
| 26 | |
| 14 | |
| 28 | |
| 20 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 7 + 9 + 6 + 6
p = 28
Simplify (6a)(2ab) - (4a2)(8b).
| 96a2b | |
| 96ab2 | |
| 20ab2 | |
| -20a2b |
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.
(6a)(2ab) - (4a2)(8b)
(6 x 2)(a x a x b) - (4 x 8)(a2 x b)
(12)(a1+1 x b) - (32)(a2b)
12a2b - 32a2b
-20a2b