| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
If a = 5, b = 2, c = 2, and d = 5, what is the perimeter of this quadrilateral?
| 22 | |
| 14 | |
| 20 | |
| 25 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 5 + 2 + 2 + 5
p = 14
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h |
|
π r2h2 |
|
2(π r2) + 2π rh |
|
4π r2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
The formula for the area of a circle is which of the following?
a = π d2 |
|
a = π r2 |
|
a = π r |
|
a = 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.
Solve for y:
-2y - 2 = -5 - 9y
| -1 | |
| -\(\frac{3}{7}\) | |
| -\(\frac{2}{3}\) | |
| -\(\frac{5}{9}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
-2y - 2 = -5 - 9y
-2y = -5 - 9y + 2
-2y + 9y = -5 + 2
7y = -3
y = \( \frac{-3}{7} \)
y = -\(\frac{3}{7}\)
The endpoints of this line segment are at (-2, 2) and (2, 6). What is the slope of this line?
| -3 | |
| 2\(\frac{1}{2}\) | |
| 1 | |
| -1 |
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, 2) and (2, 6) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(6.0) - (2.0)}{(2) - (-2)} \) = \( \frac{4}{4} \)