| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
Solve -7b + 2b = 6b + 8x - 9 for b in terms of x.
| -2\(\frac{1}{3}\)x + 2\(\frac{1}{3}\) | |
| -\(\frac{6}{13}\)x + \(\frac{9}{13}\) | |
| -9x - 7 | |
| -\(\frac{5}{6}\)x + \(\frac{1}{3}\) |
To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.
-7b + 2x = 6b + 8x - 9
-7b = 6b + 8x - 9 - 2x
-7b - 6b = 8x - 9 - 2x
-13b = 6x - 9
b = \( \frac{6x - 9}{-13} \)
b = \( \frac{6x}{-13} \) + \( \frac{-9}{-13} \)
b = -\(\frac{6}{13}\)x + \(\frac{9}{13}\)
The formula for the area of a circle is which of the following?
a = π d2 |
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a = π r2 |
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a = π d |
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a = π r |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
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right angle |
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equal length |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
A quadrilateral is a shape with __________ sides.
4 |
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2 |
|
5 |
|
3 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
If a = c = 6, b = d = 2, and the blue angle = 55°, what is the area of this parallelogram?
| 12 | |
| 25 | |
| 28 | |
| 3 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 2
a = 12