| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
Solve for c:
-4c - 4 < \( \frac{c}{3} \)
| c < -\(\frac{4}{11}\) | |
| c < \(\frac{54}{73}\) | |
| c < -\(\frac{12}{13}\) | |
| c < -\(\frac{2}{17}\) |
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.
-4c - 4 < \( \frac{c}{3} \)
3 x (-4c - 4) < c
(3 x -4c) + (3 x -4) < c
-12c - 12 < c
-12c - 12 - c < 0
-12c - c < 12
-13c < 12
c < \( \frac{12}{-13} \)
c < -\(\frac{12}{13}\)
If a = c = 8, b = d = 2, and the blue angle = 56°, what is the area of this parallelogram?
| 16 | |
| 14 | |
| 36 | |
| 12 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 8 x 2
a = 16
The formula for the area of a circle is which of the following?
a = π d2 |
|
a = π d |
|
a = π r2 |
|
a = 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.
A coordinate grid is composed of which of the following?
x-axis |
|
y-axis |
|
all of these |
|
origin |
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.
The formula for the area of a circle is which of the following?
c = π r2 |
|
c = π d2 |
|
c = π d |
|
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.