| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.72 |
| Score | 0% | 54% |
If angle a = 66° and angle b = 34° what is the length of angle c?
| 119° | |
| 110° | |
| 80° | |
| 78° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 66° - 34° = 80°
The endpoints of this line segment are at (-2, -1) and (2, 3). What is the slope of this line?
| \(\frac{1}{2}\) | |
| 3 | |
| 1 | |
| -1\(\frac{1}{2}\) |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -1) and (2, 3) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(3.0) - (-1.0)}{(2) - (-2)} \) = \( \frac{4}{4} \)The formula for the area of a circle is which of the following?
c = π r |
|
c = π d2 |
|
c = π r2 |
|
c = π d |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
|
right angle |
|
equal length |
|
equal angle |
A trapezoid is a quadrilateral with one set of parallel sides.
Simplify (y + 1)(y - 9)
| y2 - 8y - 9 | |
| y2 - 10y + 9 | |
| y2 + 10y + 9 | |
| y2 + 8y - 9 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y + 1)(y - 9)
(y x y) + (y x -9) + (1 x y) + (1 x -9)
y2 - 9y + y - 9
y2 - 8y - 9