| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
Solve for a:
a2 + 3a - 40 = 0
| 8 or -4 | |
| -2 or -9 | |
| 5 or -8 | |
| -7 or -7 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
a2 + 3a - 40 = 0
(a - 5)(a + 8) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (a - 5) or (a + 8) must equal zero:
If (a - 5) = 0, a must equal 5
If (a + 8) = 0, a must equal -8
So the solution is that a = 5 or -8
If AD = 14 and BD = 4, AB = ?
| 8 | |
| 10 | |
| 15 | |
| 6 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDThe dimensions of this cube are height (h) = 9, length (l) = 3, and width (w) = 8. What is the volume?
| 216 | |
| 15 | |
| 189 | |
| 40 |
The volume of a cube is height x length x width:
v = h x l x w
v = 9 x 3 x 8
v = 216
A(n) __________ is to a parallelogram as a square is to a rectangle.
trapezoid |
|
quadrilateral |
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rhombus |
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triangle |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
Which types of triangles will always have at least two sides of equal length?
equilateral and right |
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equilateral and isosceles |
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isosceles and right |
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equilateral, isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.