| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
What is 3a2 + 4a2?
| 12a2 | |
| -a4 | |
| 7a4 | |
| 7a2 |
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.
3a2 + 4a2 = 7a2
If a = c = 6, b = d = 8, and the blue angle = 77°, what is the area of this parallelogram?
| 48 | |
| 6 | |
| 54 | |
| 36 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 8
a = 48
Simplify 3a x 3b.
| 6ab | |
| 9a2b2 | |
| 9\( \frac{b}{a} \) | |
| 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.
3a x 3b = (3 x 3) (a x b) = 9ab
The dimensions of this cylinder are height (h) = 1 and radius (r) = 3. What is the volume?
| 32π | |
| 147π | |
| 196π | |
| 9π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(32 x 1)
v = 9π
Which of the following is not true about both rectangles and squares?
the area is length x width |
|
the perimeter is the sum of the lengths of all four sides |
|
the lengths of all sides are equal |
|
all interior angles are right angles |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).