| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
Solve for x:
-4x + 2 = 3 - 3x
| 6 | |
| \(\frac{1}{2}\) | |
| -1\(\frac{1}{3}\) | |
| -1 |
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 equal sign and the answer on the other.
-4x + 2 = 3 - 3x
-4x = 3 - 3x - 2
-4x + 3x = 3 - 2
-x = 1
x = \( \frac{1}{-1} \)
x = -1
A(n) __________ is to a parallelogram as a square is to a rectangle.
trapezoid |
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quadrilateral |
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triangle |
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rhombus |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
What is 8a + 4a?
| 12a2 | |
| 12a | |
| 32a2 | |
| 4a2 |
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.
8a + 4a = 12a
The dimensions of this cylinder are height (h) = 7 and radius (r) = 4. What is the volume?
| 25π | |
| 448π | |
| 72π | |
| 112π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(42 x 7)
v = 112π
Which of the following statements about math operations is incorrect?
you can multiply monomials that have different variables and different exponents |
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you can subtract 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 add 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.