| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Simplify (y - 9)(y - 1)
| y2 + 8y - 9 | |
| y2 - 8y - 9 | |
| y2 - 10y + 9 | |
| y2 + 10y + 9 |
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 - 9)(y - 1)
(y x y) + (y x -1) + (-9 x y) + (-9 x -1)
y2 - y - 9y + 9
y2 - 10y + 9
If side x = 14cm, side y = 5cm, and side z = 9cm what is the perimeter of this triangle?
| 28cm | |
| 26cm | |
| 36cm | |
| 27cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 14cm + 5cm + 9cm = 28cm
What is the circumference of a circle with a diameter of 18?
| 18π | |
| 8π | |
| 22π | |
| 2π |
The formula for circumference is circle diameter x π:
c = πd
c = 18π
If the length of AB equals the length of BD, point B __________ this line segment.
bisects |
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intersects |
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trisects |
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midpoints |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
Which of the following is not true about both rectangles and squares?
the perimeter is the sum of the lengths of all four sides |
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all interior angles are right angles |
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the area is length x width |
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the lengths of all sides are equal |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).