| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.84 |
| Score | 0% | 77% |
Solve for y:
y2 + 4y - 21 = 0
| 3 or 1 | |
| 3 or -7 | |
| 8 or -5 | |
| 6 or -4 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
y2 + 4y - 21 = 0
(y - 3)(y + 7) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (y - 3) or (y + 7) must equal zero:
If (y - 3) = 0, y must equal 3
If (y + 7) = 0, y must equal -7
So the solution is that y = 3 or -7
A right angle measures:
90° |
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360° |
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180° |
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45° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
If side x = 6cm, side y = 14cm, and side z = 11cm what is the perimeter of this triangle?
| 29cm | |
| 34cm | |
| 31cm | |
| 36cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 6cm + 14cm + 11cm = 31cm
A trapezoid is a quadrilateral with one set of __________ sides.
equal length |
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right angle |
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equal angle |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
First |
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Inside |
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Odd |
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Last |
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.