| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
What is 3a7 + 2a7?
| 5 | |
| 5a14 | |
| 5a7 | |
| 1 |
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.
3a7 + 2a7 = 5a7
If a = -5 and x = 2, what is the value of -a(a - x)?
| 1458 | |
| 0 | |
| 56 | |
| -35 |
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.)
-a(a - x)
-1(-5)(-5 - 2)
-1(-5)(-7)
(5)(-7)
-35
If a = c = 4, b = d = 1, and the blue angle = 66°, what is the area of this parallelogram?
| 3 | |
| 8 | |
| 4 | |
| 42 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 4 x 1
a = 4
Breaking apart a quadratic expression into a pair of binomials is called:
deconstructing |
|
squaring |
|
factoring |
|
normalizing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.
Which of the following statements about a triangle is not true?
area = ½bh |
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perimeter = sum of side lengths |
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sum of interior angles = 180° |
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exterior angle = sum of two adjacent interior angles |
A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.