| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.21 |
| Score | 0% | 64% |
If a = c = 6, b = d = 7, and the blue angle = 63°, what is the area of this parallelogram?
| 30 | |
| 63 | |
| 42 | |
| 21 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 7
a = 42
Simplify (4a)(4ab) + (4a2)(2b).
| 24ab2 | |
| 24a2b | |
| 48ab2 | |
| 8ab2 |
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.
(4a)(4ab) + (4a2)(2b)
(4 x 4)(a x a x b) + (4 x 2)(a2 x b)
(16)(a1+1 x b) + (8)(a2b)
16a2b + 8a2b
24a2b
The dimensions of this trapezoid are a = 5, b = 6, c = 7, d = 3, and h = 4. What is the area?
| 12\(\frac{1}{2}\) | |
| 19\(\frac{1}{2}\) | |
| 6 | |
| 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(6 + 3)(4)
a = ½(9)(4)
a = ½(36) = \( \frac{36}{2} \)
a = 18
Which of the following statements about math operations is incorrect?
you can multiply monomials that have different variables and different exponents |
|
you can add monomials that have the same variable and the same exponent |
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all of these statements are correct |
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you can subtract monomials that have the same variable and the same exponent |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
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right angle |
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equal angle |
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equal length |
A trapezoid is a quadrilateral with one set of parallel sides.