| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
What is 2a2 + 3a2?
| -a4 | |
| 6a4 | |
| 5a2 | |
| 6a2 |
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.
2a2 + 3a2 = 5a2
Which of the following statements about a triangle is not true?
area = ½bh |
|
sum of interior angles = 180° |
|
exterior angle = sum of two adjacent interior angles |
|
perimeter = sum of side lengths |
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.
Order the following types of angle from least number of degrees to most number of degrees.
acute, obtuse, right |
|
right, obtuse, acute |
|
right, acute, obtuse |
|
acute, right, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
Solve for x:
6x - 9 > \( \frac{x}{9} \)
| x > \(\frac{7}{15}\) | |
| x > -2\(\frac{6}{13}\) | |
| x > -\(\frac{6}{11}\) | |
| x > 1\(\frac{28}{53}\) |
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.
6x - 9 > \( \frac{x}{9} \)
9 x (6x - 9) > x
(9 x 6x) + (9 x -9) > x
54x - 81 > x
54x - 81 - x > 0
54x - x > 81
53x > 81
x > \( \frac{81}{53} \)
x > 1\(\frac{28}{53}\)
A quadrilateral is a shape with __________ sides.
4 |
|
3 |
|
5 |
|
2 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.