| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
A(n) __________ is to a parallelogram as a square is to a rectangle.
quadrilateral |
|
rhombus |
|
trapezoid |
|
triangle |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
What is the circumference of a circle with a diameter of 4?
| 19π | |
| 9π | |
| 4π | |
| 10π |
The formula for circumference is circle diameter x π:
c = πd
c = 4π
If angle a = 47° and angle b = 51° what is the length of angle c?
| 93° | |
| 91° | |
| 101° | |
| 82° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 47° - 51° = 82°
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
|
squaring |
|
factoring |
|
deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
Solve for y:
y2 + 13y + 36 = 0
| -4 or -9 | |
| -1 or -2 | |
| 6 or -1 | |
| -3 or -8 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
y2 + 13y + 36 = 0
(y + 4)(y + 9) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (y + 4) or (y + 9) must equal zero:
If (y + 4) = 0, y must equal -4
If (y + 9) = 0, y must equal -9
So the solution is that y = -4 or -9