| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
Factor y2 - 5y - 6
| (y - 6)(y + 1) | |
| (y - 6)(y - 1) | |
| (y + 6)(y + 1) | |
| (y + 6)(y - 1) |
To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce -6 as well and sum (Inside, Outside) to equal -5. For this problem, those two numbers are -6 and 1. Then, plug these into a set of binomials using the square root of the First variable (y2):
y2 - 5y - 6
y2 + (-6 + 1)y + (-6 x 1)
(y - 6)(y + 1)
If a = c = 7, b = d = 8, and the blue angle = 63°, what is the area of this parallelogram?
| 20 | |
| 56 | |
| 36 | |
| 30 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 7 x 8
a = 56
The dimensions of this cylinder are height (h) = 5 and radius (r) = 7. What is the volume?
| 576π | |
| 50π | |
| 245π | |
| 294π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(72 x 5)
v = 245π
If BD = 20 and AD = 21, AB = ?
| 1 | |
| 17 | |
| 6 | |
| 20 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDOn this circle, line segment CD is the:
chord |
|
circumference |
|
diameter |
|
radius |
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).