| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.81 |
| Score | 0% | 56% |
Simplify 8a x 9b.
| 72a2b2 | |
| 17ab | |
| 72ab | |
| 72\( \frac{a}{b} \) |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
8a x 9b = (8 x 9) (a x b) = 72ab
On this circle, a line segment connecting point A to point D is called:
chord |
|
circumference |
|
diameter |
|
radius |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
Solve for a:
-6a + 9 > \( \frac{a}{5} \)
| a > -\(\frac{28}{33}\) | |
| a > \(\frac{10}{19}\) | |
| a > \(\frac{15}{41}\) | |
| a > 1\(\frac{14}{31}\) |
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.
-6a + 9 > \( \frac{a}{5} \)
5 x (-6a + 9) > a
(5 x -6a) + (5 x 9) > a
-30a + 45 > a
-30a + 45 - a > 0
-30a - a > -45
-31a > -45
a > \( \frac{-45}{-31} \)
a > 1\(\frac{14}{31}\)
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
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obtuse, acute |
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supplementary, vertical |
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acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
On this circle, line segment CD is the:
radius |
|
chord |
|
circumference |
|
diameter |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).