| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.17 |
| Score | 0% | 63% |
Solve for c:
7c - 8 = \( \frac{c}{4} \)
| -\(\frac{16}{19}\) | |
| 1\(\frac{2}{19}\) | |
| 1\(\frac{5}{27}\) | |
| \(\frac{30}{41}\) |
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.
7c - 8 = \( \frac{c}{4} \)
4 x (7c - 8) = c
(4 x 7c) + (4 x -8) = c
28c - 32 = c
28c - 32 - c = 0
28c - c = 32
27c = 32
c = \( \frac{32}{27} \)
c = 1\(\frac{5}{27}\)
A(n) __________ is to a parallelogram as a square is to a rectangle.
quadrilateral |
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rhombus |
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triangle |
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trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
h2 x l2 x w2 |
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h x l x w |
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2lw x 2wh + 2lh |
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lw x wh + lh |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
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factoring |
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squaring |
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deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
The formula for the area of a circle is which of the following?
a = π r |
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a = π d2 |
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a = π r2 |
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a = π d |
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.