| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.84 |
| Score | 0% | 57% |
What is 9a8 + 9a8?
| 81a8 | |
| a816 | |
| 18 | |
| 18a8 |
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.
9a8 + 9a8 = 18a8
Solve -6a - 2a = -7a + 9z - 8 for a in terms of z.
| 11z - 8 | |
| \(\frac{9}{17}\)z + \(\frac{7}{17}\) | |
| 2\(\frac{1}{2}\)z - 2\(\frac{1}{4}\) | |
| -2\(\frac{1}{2}\)z + \(\frac{2}{3}\) |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
-6a - 2z = -7a + 9z - 8
-6a = -7a + 9z - 8 + 2z
-6a + 7a = 9z - 8 + 2z
a = 11z - 8
Which of the following expressions contains exactly two terms?
quadratic |
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binomial |
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polynomial |
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monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
The endpoints of this line segment are at (-2, 7) and (2, -3). What is the slope of this line?
| -2 | |
| -2\(\frac{1}{2}\) | |
| -1\(\frac{1}{2}\) | |
| 2 |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, 7) and (2, -3) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(-3.0) - (7.0)}{(2) - (-2)} \) = \( \frac{-10}{4} \)If the length of AB equals the length of BD, point B __________ this line segment.
bisects |
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midpoints |
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trisects |
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intersects |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.