| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.62 |
| Score | 0% | 72% |
The dimensions of this cylinder are height (h) = 3 and radius (r) = 9. What is the volume?
| 128π | |
| 243π | |
| 175π | |
| 4π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(92 x 3)
v = 243π
If angle a = 43° and angle b = 44° what is the length of angle d?
| 143° | |
| 131° | |
| 142° | |
| 137° |
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° - 43° - 44° = 93°
So, d° = 44° + 93° = 137°
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° - 43° = 137°
The dimensions of this cube are height (h) = 8, length (l) = 7, and width (w) = 9. What is the volume?
| 189 | |
| 108 | |
| 504 | |
| 135 |
The volume of a cube is height x length x width:
v = h x l x w
v = 8 x 7 x 9
v = 504
What is 2a9 + 6a9?
| 12a9 | |
| -4 | |
| 8a9 | |
| 12a18 |
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.
2a9 + 6a9 = 8a9
Which of the following expressions contains exactly two terms?
quadratic |
|
binomial |
|
monomial |
|
polynomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.