| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
Solve for y:
-y - 2 = \( \frac{y}{-8} \)
| \(\frac{6}{17}\) | |
| \(\frac{8}{13}\) | |
| -2\(\frac{2}{7}\) | |
| -2\(\frac{4}{19}\) |
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 equal sign and the answer on the other.
-y - 2 = \( \frac{y}{-8} \)
-8 x (-y - 2) = y
(-8 x -y) + (-8 x -2) = y
8y + 16 = y
8y + 16 - y = 0
8y - y = -16
7y = -16
y = \( \frac{-16}{7} \)
y = -2\(\frac{2}{7}\)
A coordinate grid is composed of which of the following?
origin |
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y-axis |
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x-axis |
|
all of these |
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.
If a = c = 7, b = d = 3, and the blue angle = 53°, what is the area of this parallelogram?
| 63 | |
| 45 | |
| 9 | |
| 21 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 7 x 3
a = 21
The formula for the area of a circle is which of the following?
c = π d |
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c = π d2 |
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c = π r |
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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.
The dimensions of this cylinder are height (h) = 9 and radius (r) = 9. What is the volume?
| 729π | |
| 320π | |
| 216π | |
| 7π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(92 x 9)
v = 729π