| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
If b = -7 and z = -6, what is the value of -8b(b - z)?
| 40 | |
| -42 | |
| -216 | |
| -56 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
-8b(b - z)
-8(-7)(-7 + 6)
-8(-7)(-1)
(56)(-1)
-56
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
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equilateral, isosceles and right |
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equilateral and right |
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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.
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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midpoints |
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trisects |
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.
Solve for z:
z2 - 3z - 18 = 0
| 5 or -1 | |
| -2 or -9 | |
| -3 or 6 | |
| 9 or 8 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
z2 - 3z - 18 = 0
(z + 3)(z - 6) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (z + 3) or (z - 6) must equal zero:
If (z + 3) = 0, z must equal -3
If (z - 6) = 0, z must equal 6
So the solution is that z = -3 or 6
If a = c = 2, b = d = 4, what is the area of this rectangle?
| 8 | |
| 9 | |
| 24 | |
| 16 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 2 x 4
a = 8