| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.80 |
| Score | 0% | 56% |
What is 4a - 4a?
| 2 | |
| 0a | |
| 16a2 | |
| 8a2 |
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.
4a - 4a = 0a
The dimensions of this cylinder are height (h) = 3 and radius (r) = 4. What is the volume?
| 8π | |
| 48π | |
| 243π | |
| 448π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(42 x 3)
v = 48π
The formula for the area of a circle is which of the following?
c = π d2 |
|
c = π d |
|
c = π r2 |
|
c = π r |
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.
Which of the following statements about a parallelogram is not true?
a parallelogram is a quadrilateral |
|
the area of a parallelogram is base x height |
|
the perimeter of a parallelogram is the sum of the lengths of all sides |
|
opposite sides and adjacent angles are equal |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
If a = c = 6, b = d = 7, and the blue angle = 55°, what is the area of this parallelogram?
| 7 | |
| 42 | |
| 8 | |
| 12 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 7
a = 42