| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
What is 7a - 9a?
| -2 | |
| -2a2 | |
| 16a2 | |
| -2a |
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 - 9a = -2a
If angle a = 29° and angle b = 51° what is the length of angle c?
| 100° | |
| 73° | |
| 87° | |
| 132° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 29° - 51° = 100°
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
First |
|
Odd |
|
Inside |
|
Last |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.
If angle a = 38° and angle b = 67° what is the length of angle d?
| 147° | |
| 142° | |
| 128° | |
| 136° |
An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite:
d° = b° + c°
To find angle c, remember that the sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 38° - 67° = 75°
So, d° = 67° + 75° = 142°
A shortcut to get this answer is to remember that angles around a line add up to 180°:
a° + d° = 180°
d° = 180° - a°
d° = 180° - 38° = 142°
The dimensions of this cylinder are height (h) = 6 and radius (r) = 3. What is the volume?
| 8π | |
| 16π | |
| 294π | |
| 54π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(32 x 6)
v = 54π