| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.70 |
| Score | 0% | 74% |
Simplify 3a x 4b.
| 12\( \frac{a}{b} \) | |
| 12\( \frac{b}{a} \) | |
| 12ab | |
| 12a2b2 |
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.
3a x 4b = (3 x 4) (a x b) = 12ab
Find the value of c:
-3c + x = 8
c + 5x = 7
| -2\(\frac{1}{16}\) | |
| -7\(\frac{1}{2}\) | |
| -1\(\frac{3}{56}\) | |
| \(\frac{43}{54}\) |
You need to find the value of c so solve the first equation in terms of x:
-3c + x = 8
x = 8 + 3c
then substitute the result (8 - -3c) into the second equation:
c + 5(8 + 3c) = 7
c + (5 x 8) + (5 x 3c) = 7
c + 40 + 15c = 7
c + 15c = 7 - 40
16c = -33
c = \( \frac{-33}{16} \)
c = -2\(\frac{1}{16}\)
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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acute, obtuse |
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supplementary, vertical |
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obtuse, acute |
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).
A quadrilateral is a shape with __________ sides.
3 |
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5 |
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2 |
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4 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
A coordinate grid is composed of which of the following?
y-axis |
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all of these |
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x-axis |
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origin |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.