| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
Simplify (9a)(8ab) + (9a2)(3b).
| 99a2b | |
| -45a2b | |
| 204ab2 | |
| 45ab2 |
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.
(9a)(8ab) + (9a2)(3b)
(9 x 8)(a x a x b) + (9 x 3)(a2 x b)
(72)(a1+1 x b) + (27)(a2b)
72a2b + 27a2b
99a2b
The endpoints of this line segment are at (-2, 8) and (2, -4). What is the slope of this line?
| 2\(\frac{1}{2}\) | |
| -3 | |
| -\(\frac{1}{2}\) | |
| 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, 8) and (2, -4) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(-4.0) - (8.0)}{(2) - (-2)} \) = \( \frac{-12}{4} \)What is 7a - 3a?
| a2 | |
| 4a | |
| 4a2 | |
| 4 |
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.
7a - 3a = 4a
If a = c = 2, b = d = 3, what is the area of this rectangle?
| 4 | |
| 40 | |
| 6 | |
| 48 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 2 x 3
a = 6
A(n) __________ is to a parallelogram as a square is to a rectangle.
quadrilateral |
|
triangle |
|
trapezoid |
|
rhombus |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.