| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
What is 8a - 4a?
| 4 | |
| 4a | |
| 12 | |
| 32a |
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.
8a - 4a = 4a
The dimensions of this cube are height (h) = 2, length (l) = 6, and width (w) = 8. What is the volume?
| 56 | |
| 63 | |
| 96 | |
| 2 |
The volume of a cube is height x length x width:
v = h x l x w
v = 2 x 6 x 8
v = 96
If a = c = 8, b = d = 1, and the blue angle = 74°, what is the area of this parallelogram?
| 4 | |
| 8 | |
| 21 | |
| 16 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 8 x 1
a = 8
Which of the following statements about a parallelogram is not true?
the area of a parallelogram is base x height |
|
the perimeter of a parallelogram is the sum of the lengths of all sides |
|
opposite sides and adjacent angles are equal |
|
a parallelogram is a quadrilateral |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
Simplify (4a)(8ab) - (6a2)(8b).
| 16ab2 | |
| 80a2b | |
| 80ab2 | |
| -16a2b |
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.
(4a)(8ab) - (6a2)(8b)
(4 x 8)(a x a x b) - (6 x 8)(a2 x b)
(32)(a1+1 x b) - (48)(a2b)
32a2b - 48a2b
-16a2b