| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
What is the area of a circle with a radius of 4?
| 2π | |
| 16π | |
| 81π | |
| 64π |
The formula for area is πr2:
a = πr2
a = π(42)
a = 16π
A cylinder with a radius (r) and a height (h) has a surface area of:
π r2h |
|
π r2h2 |
|
4π r2 |
|
2(π r2) + 2π rh |
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.
What is 7a - 7a?
| 0a | |
| 2 | |
| 0 | |
| 49a |
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.
7a - 7a = 0a
Solve for x:
4x + 7 < 9 + 3x
| x < 2 | |
| x < -\(\frac{2}{3}\) | |
| x < 1\(\frac{2}{5}\) | |
| x < -\(\frac{3}{5}\) |
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.
4x + 7 < 9 + 3x
4x < 9 + 3x - 7
4x - 3x < 9 - 7
x < 2
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
|
equilateral, isosceles and right |
|
isosceles and right |
|
equilateral and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.