| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
The dimensions of this cylinder are height (h) = 5 and radius (r) = 2. What is the volume?
| 45π | |
| 128π | |
| 20π | |
| 324π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(22 x 5)
v = 20π
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
addition |
|
exponents |
|
division |
|
pairs |
When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve for y:
5y + 1 < 4 - 8y
| y < \(\frac{5}{9}\) | |
| y < -\(\frac{6}{7}\) | |
| y < \(\frac{3}{13}\) | |
| y < -\(\frac{2}{3}\) |
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.
5y + 1 < 4 - 8y
5y < 4 - 8y - 1
5y + 8y < 4 - 1
13y < 3
y < \( \frac{3}{13} \)
y < \(\frac{3}{13}\)
What is the circumference of a circle with a radius of 15?
| 30π | |
| 2π | |
| 19π | |
| 15π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 15)
c = 30π
If BD = 17 and AD = 20, AB = ?
| 3 | |
| 18 | |
| 7 | |
| 5 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BD