| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.95 |
| Score | 0% | 59% |
A trapezoid is a quadrilateral with one set of __________ sides.
right angle |
|
equal length |
|
equal angle |
|
parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
The endpoints of this line segment are at (-2, 2) and (2, 0). What is the slope of this line?
| -2 | |
| 1\(\frac{1}{2}\) | |
| -\(\frac{1}{2}\) | |
| \(\frac{1}{2}\) |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, 2) and (2, 0) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(0.0) - (2.0)}{(2) - (-2)} \) = \( \frac{-2}{4} \)Simplify (2a)(3ab) + (5a2)(6b).
| 36a2b | |
| 55ab2 | |
| 24ab2 | |
| 55a2b |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(2a)(3ab) + (5a2)(6b)
(2 x 3)(a x a x b) + (5 x 6)(a2 x b)
(6)(a1+1 x b) + (30)(a2b)
6a2b + 30a2b
36a2b
The dimensions of this cylinder are height (h) = 3 and radius (r) = 3. What is the surface area?
| 72π | |
| 224π | |
| 36π | |
| 210π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(32) + 2π(3 x 3)
sa = 2π(9) + 2π(9)
sa = (2 x 9)π + (2 x 9)π
sa = 18π + 18π
sa = 36π
If a = c = 1, b = d = 9, and the blue angle = 78°, what is the area of this parallelogram?
| 48 | |
| 21 | |
| 9 | |
| 15 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 1 x 9
a = 9