| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
Solve c + 3c = -c - 7x + 9 for c in terms of x.
| -5x + 4\(\frac{1}{2}\) | |
| -x - 1 | |
| x - 1\(\frac{1}{2}\) | |
| -x + 1 |
To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.
c + 3x = -c - 7x + 9
c = -c - 7x + 9 - 3x
c + c = -7x + 9 - 3x
2c = -10x + 9
c = \( \frac{-10x + 9}{2} \)
c = \( \frac{-10x}{2} \) + \( \frac{9}{2} \)
c = -5x + 4\(\frac{1}{2}\)
If a = c = 3, b = d = 4, and the blue angle = 54°, what is the area of this parallelogram?
| 49 | |
| 32 | |
| 12 | |
| 18 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 3 x 4
a = 12
A(n) __________ is two expressions separated by an equal sign.
expression |
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problem |
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equation |
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formula |
An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
A coordinate grid is composed of which of the following?
x-axis |
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origin |
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all of these |
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y-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
On this circle, line segment CD is the:
diameter |
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radius |
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chord |
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circumference |
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).