| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.17 |
| Score | 0% | 63% |
If a = c = 7, b = d = 8, and the blue angle = 72°, what is the area of this parallelogram?
| 32 | |
| 27 | |
| 7 | |
| 56 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 7 x 8
a = 56
Simplify 8a x 6b.
| 48\( \frac{b}{a} \) | |
| 48a2b2 | |
| 48\( \frac{a}{b} \) | |
| 48ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
8a x 6b = (8 x 6) (a x b) = 48ab
The dimensions of this cube are height (h) = 9, length (l) = 5, and width (w) = 9. What is the surface area?
| 24 | |
| 54 | |
| 342 | |
| 70 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 5 x 9) + (2 x 9 x 9) + (2 x 5 x 9)
sa = (90) + (162) + (90)
sa = 342
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.
A coordinate grid is composed of which of the following?
x-axis |
|
all of these |
|
origin |
|
y-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.