| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
If the length of AB equals the length of BD, point B __________ this line segment.
intersects |
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bisects |
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midpoints |
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trisects |
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.
Which of the following statements about a parallelogram is not true?
the perimeter of a parallelogram is the sum of the lengths of all sides |
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the area of a parallelogram is base x height |
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opposite sides and adjacent angles are equal |
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a parallelogram is a quadrilateral |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
What is 2a - 2a?
| 4a2 | |
| 0a | |
| 2 | |
| a2 |
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.
2a - 2a = 0a
If c = 4 and x = -4, what is the value of 5c(c - x)?
| 108 | |
| 576 | |
| 160 | |
| 140 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
5c(c - x)
5(4)(4 + 4)
5(4)(8)
(20)(8)
160
Solve for a:
-7a - 5 = 9 - 9a
| 1\(\frac{1}{2}\) | |
| -2 | |
| 7 | |
| -\(\frac{7}{9}\) |
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.
-7a - 5 = 9 - 9a
-7a = 9 - 9a + 5
-7a + 9a = 9 + 5
2a = 14
a = \( \frac{14}{2} \)
a = 7