| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
Simplify (y + 6)(y + 7)
| y2 + 13y + 42 | |
| y2 - 13y + 42 | |
| y2 + y - 42 | |
| y2 - y - 42 |
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 + 6)(y + 7)
(y x y) + (y x 7) + (6 x y) + (6 x 7)
y2 + 7y + 6y + 42
y2 + 13y + 42
If a = c = 4, b = d = 2, and the blue angle = 79°, what is the area of this parallelogram?
| 40 | |
| 8 | |
| 25 | |
| 9 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 4 x 2
a = 8
What is 9a6 - 3a6?
| 6 | |
| 6a6 | |
| 6a12 | |
| 27a6 |
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.
9a6 - 3a6 = 6a6
A coordinate grid is composed of which of the following?
y-axis |
|
all of these |
|
origin |
|
x-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
If a = -9 and y = 2, what is the value of -3a(a - y)?
| 0 | |
| -147 | |
| 48 | |
| -297 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
-3a(a - y)
-3(-9)(-9 - 2)
-3(-9)(-11)
(27)(-11)
-297