| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
What is 8a - 8a?
| 0a | |
| 16a2 | |
| 64a2 | |
| 0 |
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 - 8a = 0a
Simplify (y + 2)(y - 3)
| y2 - 5y + 6 | |
| y2 + 5y + 6 | |
| y2 - y - 6 | |
| y2 + y - 6 |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:
(y + 2)(y - 3)
(y x y) + (y x -3) + (2 x y) + (2 x -3)
y2 - 3y + 2y - 6
y2 - y - 6
What is 3a9 - 6a9?
| -3 | |
| 9 | |
| 18a9 | |
| -3a9 |
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.
3a9 - 6a9 = -3a9
If a = c = 7, b = d = 1, what is the area of this rectangle?
| 9 | |
| 32 | |
| 7 | |
| 42 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 7 x 1
a = 7
A(n) __________ is to a parallelogram as a square is to a rectangle.
rhombus |
|
triangle |
|
quadrilateral |
|
trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.