| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.88 |
| Score | 0% | 78% |
If a = 9, b = 9, c = 4, and d = 9, what is the perimeter of this quadrilateral?
| 15 | |
| 31 | |
| 20 | |
| 14 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 9 + 9 + 4 + 9
p = 31
A(n) __________ is two expressions separated by an equal sign.
equation |
|
expression |
|
formula |
|
problem |
An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
The dimensions of this cube are height (h) = 6, length (l) = 3, and width (w) = 5. What is the volume?
| 16 | |
| 84 | |
| 90 | |
| 96 |
The volume of a cube is height x length x width:
v = h x l x w
v = 6 x 3 x 5
v = 90
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
acute, obtuse |
|
supplementary, vertical |
|
vertical, supplementary |
|
obtuse, acute |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
What is 2a - 7a?
| -5a2 | |
| 14a | |
| -5a | |
| -5 |
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.
2a - 7a = -5a