| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.72 |
| Score | 0% | 74% |
If a = 1, b = 9, c = 8, and d = 3, what is the perimeter of this quadrilateral?
| 21 | |
| 18 | |
| 22 | |
| 27 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 1 + 9 + 8 + 3
p = 21
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
|
right angle |
|
equal length |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
If c = 4 and y = 7, what is the value of 8c(c - y)?
| 180 | |
| -480 | |
| -30 | |
| -96 |
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.)
8c(c - y)
8(4)(4 - 7)
8(4)(-3)
(32)(-3)
-96
Breaking apart a quadratic expression into a pair of binomials is called:
normalizing |
|
deconstructing |
|
factoring |
|
squaring |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
What is 5a9 - 7a9?
| -2 | |
| a918 | |
| 12 | |
| -2a9 |
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.
5a9 - 7a9 = -2a9