| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
Which of the following statements about math operations is incorrect?
all of these statements are correct |
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you can subtract monomials that have the same variable and the same exponent |
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you can add monomials that have the same variable and the same exponent |
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you can multiply monomials that have different variables and different exponents |
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.
The endpoints of this line segment are at (-2, -7) and (2, 5). What is the slope of this line?
| -3 | |
| 1 | |
| 3 | |
| 2 |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -7) and (2, 5) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(5.0) - (-7.0)}{(2) - (-2)} \) = \( \frac{12}{4} \)A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
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parallel |
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equal length |
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right angle |
A trapezoid is a quadrilateral with one set of parallel sides.
The dimensions of this trapezoid are a = 4, b = 4, c = 5, d = 5, and h = 2. What is the area?
| 28 | |
| 20 | |
| 9 | |
| 10 |
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(4 + 5)(2)
a = ½(9)(2)
a = ½(18) = \( \frac{18}{2} \)
a = 9
What is the circumference of a circle with a diameter of 17?
| 19π | |
| 17π | |
| 14π | |
| 34π |
The formula for circumference is circle diameter x π:
c = πd
c = 17π