| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
Solve for z:
-z + 9 > -7 + 6z
| z > 2\(\frac{2}{7}\) | |
| z > -\(\frac{1}{4}\) | |
| z > -1 | |
| z > -1\(\frac{1}{2}\) |
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.
-z + 9 > -7 + 6z
-z > -7 + 6z - 9
-z - 6z > -7 - 9
-7z > -16
z > \( \frac{-16}{-7} \)
z > 2\(\frac{2}{7}\)
Simplify (y - 1)(y + 9)
| y2 + 8y - 9 | |
| y2 + 10y + 9 | |
| y2 - 10y + 9 | |
| y2 - 8y - 9 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y - 1)(y + 9)
(y x y) + (y x 9) + (-1 x y) + (-1 x 9)
y2 + 9y - y - 9
y2 + 8y - 9
If the base of this triangle is 2 and the height is 4, what is the area?
| 71\(\frac{1}{2}\) | |
| 4 | |
| 98 | |
| 72 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 2 x 4 = \( \frac{8}{2} \) = 4
Which of the following statements about a triangle is not true?
area = ½bh |
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exterior angle = sum of two adjacent interior angles |
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sum of interior angles = 180° |
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perimeter = sum of side lengths |
A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
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equal angle |
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right angle |
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equal length |
A trapezoid is a quadrilateral with one set of parallel sides.