| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.63 |
| Score | 0% | 73% |
What is the circumference of a circle with a diameter of 1?
| 1π | |
| 12π | |
| 7π | |
| 10π |
The formula for circumference is circle diameter x π:
c = πd
c = 1π
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
|
obtuse, acute |
|
acute, obtuse |
|
supplementary, vertical |
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).
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
|
deconstructing |
|
squaring |
|
factoring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
If a = 6, b = 4, c = 4, and d = 5, what is the perimeter of this quadrilateral?
| 19 | |
| 17 | |
| 26 | |
| 15 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 6 + 4 + 4 + 5
p = 19
If b = -3 and z = 8, what is the value of 4b(b - z)?
| 28 | |
| 132 | |
| 27 | |
| -20 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
4b(b - z)
4(-3)(-3 - 8)
4(-3)(-11)
(-12)(-11)
132