| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.99 |
| Score | 0% | 60% |
If the base of this triangle is 2 and the height is 1, what is the area?
| 1 | |
| 58\(\frac{1}{2}\) | |
| 52\(\frac{1}{2}\) | |
| 32\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 2 x 1 = \( \frac{2}{2} \) = 1
Which of the following expressions contains exactly two terms?
quadratic |
|
polynomial |
|
monomial |
|
binomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
What is the circumference of a circle with a radius of 3?
| 26π | |
| 6π | |
| 10π | |
| 15π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 3)
c = 6π
Find the value of b:
b + y = -1
4b - y = -7
| -1\(\frac{3}{5}\) | |
| -1\(\frac{4}{57}\) | |
| 3\(\frac{3}{4}\) | |
| -1\(\frac{2}{3}\) |
You need to find the value of b so solve the first equation in terms of y:
b + y = -1
y = -1 - b
then substitute the result (-1 - 1b) into the second equation:
4b - 1(-1 - b) = -7
4b + (-1 x -1) + (-1 x -b) = -7
4b + 1 + b = -7
4b + b = -7 - 1
5b = -8
b = \( \frac{-8}{5} \)
b = -1\(\frac{3}{5}\)
Which of the following is not required to define the slope-intercept equation for a line?
slope |
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y-intercept |
|
\({\Delta y \over \Delta x}\) |
|
x-intercept |
A line on the coordinate grid can be defined by a slope-intercept equation: y = mx + b. For a given value of x, the value of y can be determined given the slope (m) and y-intercept (b) of the line. The slope of a line is change in y over change in x, \({\Delta y \over \Delta x}\), and the y-intercept is the y-coordinate where the line crosses the vertical y-axis.