| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.59 |
| Score | 0% | 72% |
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
|
equal angle |
|
equal length |
|
right angle |
A trapezoid is a quadrilateral with one set of parallel sides.
The dimensions of this cube are height (h) = 7, length (l) = 9, and width (w) = 8. What is the surface area?
| 82 | |
| 110 | |
| 224 | |
| 382 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 9 x 8) + (2 x 8 x 7) + (2 x 9 x 7)
sa = (144) + (112) + (126)
sa = 382
If a = 1, b = 1, c = 3, and d = 8, what is the perimeter of this quadrilateral?
| 16 | |
| 23 | |
| 17 | |
| 13 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 1 + 1 + 3 + 8
p = 13
Simplify (7a)(9ab) - (4a2)(2b).
| 96a2b | |
| 55a2b | |
| 71ab2 | |
| 71a2b |
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.
(7a)(9ab) - (4a2)(2b)
(7 x 9)(a x a x b) - (4 x 2)(a2 x b)
(63)(a1+1 x b) - (8)(a2b)
63a2b - 8a2b
55a2b
Simplify 5a x 5b.
| 25ab | |
| 10ab | |
| 25\( \frac{b}{a} \) | |
| 25a2b2 |
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.
5a x 5b = (5 x 5) (a x b) = 25ab