| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
If a = c = 3, b = d = 1, what is the area of this rectangle?
| 14 | |
| 3 | |
| 9 | |
| 12 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 3 x 1
a = 3
The dimensions of this cylinder are height (h) = 3 and radius (r) = 9. What is the surface area?
| 192π | |
| 180π | |
| 108π | |
| 216π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(92) + 2π(9 x 3)
sa = 2π(81) + 2π(27)
sa = (2 x 81)π + (2 x 27)π
sa = 162π + 54π
sa = 216π
Solve for z:
- 2 < 7 - z
| z < 9 | |
| z < -7 | |
| z < 4\(\frac{1}{2}\) | |
| z < -1\(\frac{1}{8}\) |
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 < sign and the answer on the other.
- 2 < 7 - z
< 7 - z + 2
+ z < 7 + 2
z < 9
On this circle, a line segment connecting point A to point D is called:
circumference |
|
radius |
|
chord |
|
diameter |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
What is 4a - 6a?
| 24a | |
| -2a | |
| 10 | |
| 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.
4a - 6a = -2a