| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.01 |
| Score | 0% | 60% |
What is 3a + 6a?
| 18a2 | |
| -3 | |
| 9a | |
| 9a2 |
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.
3a + 6a = 9a
A(n) __________ is to a parallelogram as a square is to a rectangle.
triangle |
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rhombus |
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trapezoid |
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quadrilateral |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
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equilateral, isosceles and right |
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equilateral and right |
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isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
A(n) __________ is two expressions separated by an equal sign.
equation |
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expression |
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formula |
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problem |
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.
Solve -3b - 4b = -7b - 5y + 4 for b in terms of y.
| -\(\frac{8}{11}\)y + \(\frac{6}{11}\) | |
| -1\(\frac{5}{6}\)y - 1\(\frac{1}{2}\) | |
| -\(\frac{1}{4}\)y + 1 | |
| -\(\frac{1}{7}\)y + \(\frac{2}{7}\) |
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.
-3b - 4y = -7b - 5y + 4
-3b = -7b - 5y + 4 + 4y
-3b + 7b = -5y + 4 + 4y
4b = -y + 4
b = \( \frac{-y + 4}{4} \)
b = \( \frac{-y}{4} \) + \( \frac{4}{4} \)
b = -\(\frac{1}{4}\)y + 1