| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
What is 7a + 8a?
| 15a2 | |
| -1 | |
| a2 | |
| 15a |
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.
7a + 8a = 15a
If a = 3, b = 1, c = 2, and d = 7, what is the perimeter of this quadrilateral?
| 13 | |
| 26 | |
| 20 | |
| 14 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 3 + 1 + 2 + 7
p = 13
The endpoints of this line segment are at (-2, 2) and (2, 6). What is the slope of this line?
| -2 | |
| 2 | |
| 1 | |
| -1 |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, 2) and (2, 6) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(6.0) - (2.0)}{(2) - (-2)} \) = \( \frac{4}{4} \)Which of the following statements about a triangle is not true?
area = ½bh |
|
perimeter = sum of side lengths |
|
exterior angle = sum of two adjacent interior angles |
|
sum of interior angles = 180° |
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.
Which of the following expressions contains exactly two terms?
quadratic |
|
monomial |
|
polynomial |
|
binomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.