| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.54 |
| Score | 0% | 51% |
Simplify (y + 8)(y + 2)
| y2 + 6y - 16 | |
| y2 + 10y + 16 | |
| y2 - 10y + 16 | |
| y2 - 6y - 16 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y + 8)(y + 2)
(y x y) + (y x 2) + (8 x y) + (8 x 2)
y2 + 2y + 8y + 16
y2 + 10y + 16
Solve -9c + 3c = 8c - 6x - 5 for c in terms of x.
| 17x + 9 | |
| \(\frac{9}{17}\)x + \(\frac{5}{17}\) | |
| -1\(\frac{4}{5}\)x - \(\frac{4}{5}\) | |
| 2\(\frac{3}{4}\)x - 1 |
To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.
-9c + 3x = 8c - 6x - 5
-9c = 8c - 6x - 5 - 3x
-9c - 8c = -6x - 5 - 3x
-17c = -9x - 5
c = \( \frac{-9x - 5}{-17} \)
c = \( \frac{-9x}{-17} \) + \( \frac{-5}{-17} \)
c = \(\frac{9}{17}\)x + \(\frac{5}{17}\)
The formula for the area of a circle is which of the following?
c = π r2 |
|
c = π d |
|
c = π r |
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c = π d2 |
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.
If the base of this triangle is 9 and the height is 2, what is the area?
| 27 | |
| 35 | |
| 38\(\frac{1}{2}\) | |
| 9 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 9 x 2 = \( \frac{18}{2} \) = 9
Order the following types of angle from least number of degrees to most number of degrees.
acute, right, obtuse |
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right, obtuse, acute |
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acute, obtuse, right |
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right, acute, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.