| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.81 |
| Score | 0% | 76% |
If a = 4, b = 6, c = 1, and d = 6, what is the perimeter of this quadrilateral?
| 17 | |
| 30 | |
| 18 | |
| 24 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 4 + 6 + 1 + 6
p = 17
If angle a = 63° and angle b = 31° what is the length of angle c?
| 86° | |
| 80° | |
| 69° | |
| 91° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 63° - 31° = 86°
Simplify 3a x 4b.
| 12\( \frac{b}{a} \) | |
| 12\( \frac{a}{b} \) | |
| 12ab | |
| 7ab |
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
If the base of this triangle is 1 and the height is 9, what is the area?
| 37\(\frac{1}{2}\) | |
| 4\(\frac{1}{2}\) | |
| 45\(\frac{1}{2}\) | |
| 90 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 1 x 9 = \( \frac{9}{2} \) = 4\(\frac{1}{2}\)
What is 6a - 9a?
| -3 | |
| -3a | |
| 54a2 | |
| 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.
6a - 9a = -3a