| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
What is 6a - 7a?
| 42a | |
| 42a2 | |
| -1a | |
| 13a2 |
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.
6a - 7a = -1a
The dimensions of this cube are height (h) = 6, length (l) = 4, and width (w) = 1. What is the surface area?
| 22 | |
| 68 | |
| 58 | |
| 62 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 4 x 1) + (2 x 1 x 6) + (2 x 4 x 6)
sa = (8) + (12) + (48)
sa = 68
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
|
equilateral and right |
|
equilateral, isosceles and right |
|
isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
Simplify 5a x 4b.
| 20\( \frac{b}{a} \) | |
| 20ab | |
| 20a2b2 | |
| 9ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
5a x 4b = (5 x 4) (a x b) = 20ab
Breaking apart a quadratic expression into a pair of binomials is called:
squaring |
|
factoring |
|
normalizing |
|
deconstructing |
To factor a quadratic expression, apply the FOIL (First, Outside, Inside, Last) method in reverse.