| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
The formula for the area of a circle is which of the following?
c = π r |
|
c = π d2 |
|
c = π d |
|
c = π r2 |
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 b:
9b - 2 < -3 + 4b
| b < -\(\frac{2}{3}\) | |
| b < -2 | |
| b < -\(\frac{1}{9}\) | |
| b < -\(\frac{1}{5}\) |
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.
9b - 2 < -3 + 4b
9b < -3 + 4b + 2
9b - 4b < -3 + 2
5b < -1
b < \( \frac{-1}{5} \)
b < -\(\frac{1}{5}\)
If AD = 13 and BD = 3, AB = ?
| 17 | |
| 3 | |
| 7 | |
| 10 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDWhat is 7a - 5a?
| 12 | |
| a2 | |
| 2a | |
| 35a |
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 - 5a = 2a
If angle a = 55° and angle b = 62° what is the length of angle c?
| 63° | |
| 129° | |
| 112° | |
| 93° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 55° - 62° = 63°