| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
The dimensions of this cube are height (h) = 2, length (l) = 5, and width (w) = 7. What is the volume?
| 432 | |
| 25 | |
| 70 | |
| 72 |
The volume of a cube is height x length x width:
v = h x l x w
v = 2 x 5 x 7
v = 70
If a = 2, b = 5, c = 5, and d = 8, what is the perimeter of this quadrilateral?
| 27 | |
| 20 | |
| 21 | |
| 23 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 2 + 5 + 5 + 8
p = 20
On this circle, line segment CD is the:
chord |
|
circumference |
|
radius |
|
diameter |
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).
The dimensions of this trapezoid are a = 5, b = 4, c = 6, d = 3, and h = 4. What is the area?
| 14 | |
| 30 | |
| 28 | |
| 10 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(4 + 3)(4)
a = ½(7)(4)
a = ½(28) = \( \frac{28}{2} \)
a = 14
What is 7a2 - 8a2?
| 56a2 | |
| -1a2 | |
| 15a4 | |
| 56a4 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
7a2 - 8a2 = -1a2