| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
Simplify (2a)(6ab) + (5a2)(2b).
| 22ab2 | |
| 22a2b | |
| 2a2b | |
| 2ab2 |
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.
(2a)(6ab) + (5a2)(2b)
(2 x 6)(a x a x b) + (5 x 2)(a2 x b)
(12)(a1+1 x b) + (10)(a2b)
12a2b + 10a2b
22a2b
If a = 8, b = 5, c = 1, and d = 9, what is the perimeter of this quadrilateral?
| 14 | |
| 22 | |
| 23 | |
| 28 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 8 + 5 + 1 + 9
p = 23
On this circle, a line segment connecting point A to point D is called:
circumference |
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chord |
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radius |
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diameter |
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).
A trapezoid is a quadrilateral with one set of __________ sides.
right angle |
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equal angle |
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equal length |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
2lw x 2wh + 2lh |
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h x l x w |
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h2 x l2 x w2 |
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lw x wh + lh |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.