| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
If side x = 15cm, side y = 6cm, and side z = 15cm what is the perimeter of this triangle?
| 33cm | |
| 36cm | |
| 21cm | |
| 32cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 15cm + 6cm + 15cm = 36cm
On this circle, line segment CD is the:
chord |
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radius |
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diameter |
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circumference |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
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deconstructing |
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factoring |
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squaring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
What is 3a - 6a?
| -3a | |
| -3a2 | |
| -3 | |
| a2 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
3a - 6a = -3a
Solve for y:
9y - 1 = \( \frac{y}{9} \)
| \(\frac{5}{41}\) | |
| -1\(\frac{1}{2}\) | |
| 1\(\frac{7}{11}\) | |
| \(\frac{9}{80}\) |
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.
9y - 1 = \( \frac{y}{9} \)
9 x (9y - 1) = y
(9 x 9y) + (9 x -1) = y
81y - 9 = y
81y - 9 - y = 0
81y - y = 9
80y = 9
y = \( \frac{9}{80} \)
y = \(\frac{9}{80}\)