| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.49 |
| Score | 0% | 70% |
Solve for x:
7x + 1 > -2 + 9x
| x > -2 | |
| x > 1\(\frac{1}{2}\) | |
| x > -2\(\frac{1}{3}\) | |
| x > -3 |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
7x + 1 > -2 + 9x
7x > -2 + 9x - 1
7x - 9x > -2 - 1
-2x > -3
x > \( \frac{-3}{-2} \)
x > 1\(\frac{1}{2}\)
The formula for the area of a circle is which of the following?
a = π r2 |
|
a = π r |
|
a = π d |
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a = π d2 |
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.
What is 3a4 + 4a4?
| a48 | |
| -1 | |
| 12a4 | |
| 7a4 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
3a4 + 4a4 = 7a4
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
obtuse, acute |
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supplementary, vertical |
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vertical, supplementary |
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acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
The dimensions of this cube are height (h) = 8, length (l) = 9, and width (w) = 5. What is the volume?
| 12 | |
| 10 | |
| 378 | |
| 360 |
The volume of a cube is height x length x width:
v = h x l x w
v = 8 x 9 x 5
v = 360