| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
The dimensions of this trapezoid are a = 4, b = 2, c = 7, d = 9, and h = 2. What is the area?
| 25\(\frac{1}{2}\) | |
| 11 | |
| 13\(\frac{1}{2}\) | |
| 24 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(2 + 9)(2)
a = ½(11)(2)
a = ½(22) = \( \frac{22}{2} \)
a = 11
Which of the following expressions contains exactly two terms?
monomial |
|
quadratic |
|
polynomial |
|
binomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
The dimensions of this cylinder are height (h) = 3 and radius (r) = 6. What is the surface area?
| 20π | |
| 108π | |
| 180π | |
| 48π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(62) + 2π(6 x 3)
sa = 2π(36) + 2π(18)
sa = (2 x 36)π + (2 x 18)π
sa = 72π + 36π
sa = 108π
What is 7a4 + 9a4?
| -2 | |
| 16a4 | |
| 63a8 | |
| 16 |
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.
7a4 + 9a4 = 16a4
What is 3a + 2a?
| 5a | |
| 1 | |
| 6a | |
| 5a2 |
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.
3a + 2a = 5a