| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
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acute, obtuse |
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obtuse, acute |
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vertical, supplementary |
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).
If angle a = 47° and angle b = 37° what is the length of angle c?
| 77° | |
| 105° | |
| 80° | |
| 96° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 47° - 37° = 96°
Simplify (6a)(3ab) + (4a2)(3b).
| 30ab2 | |
| -6a2b | |
| 30a2b | |
| 63a2b |
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.
(6a)(3ab) + (4a2)(3b)
(6 x 3)(a x a x b) + (4 x 3)(a2 x b)
(18)(a1+1 x b) + (12)(a2b)
18a2b + 12a2b
30a2b
Which of the following expressions contains exactly two terms?
monomial |
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quadratic |
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binomial |
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polynomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
What is 8a6 - 5a6?
| 40a12 | |
| 3a6 | |
| 3a12 | |
| 13 |
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.
8a6 - 5a6 = 3a6