| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
Solve for a:
8a - 5 > 8 + 7a
| a > \(\frac{2}{9}\) | |
| a > 13 | |
| a > 1\(\frac{1}{8}\) | |
| a > -\(\frac{1}{4}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
8a - 5 > 8 + 7a
8a > 8 + 7a + 5
8a - 7a > 8 + 5
a > 13
What is 5a + 6a?
| 11a | |
| -1 | |
| 30a2 | |
| 11a2 |
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.
5a + 6a = 11a
If a = c = 7, b = d = 8, and the blue angle = 55°, what is the area of this parallelogram?
| 9 | |
| 2 | |
| 21 | |
| 56 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 7 x 8
a = 56
Simplify (y - 1)(y + 9)
| y2 + 8y - 9 | |
| y2 - 8y - 9 | |
| y2 + 10y + 9 | |
| y2 - 10y + 9 |
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 - 1)(y + 9)
(y x y) + (y x 9) + (-1 x y) + (-1 x 9)
y2 + 9y - y - 9
y2 + 8y - 9
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
|
equal length |
|
parallel |
|
right angle |
A trapezoid is a quadrilateral with one set of parallel sides.