| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
Solve for b:
-5b - 4 > \( \frac{b}{7} \)
| b > \(\frac{2}{7}\) | |
| b > -\(\frac{7}{9}\) | |
| b > 1\(\frac{1}{5}\) | |
| b > -3 |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
-5b - 4 > \( \frac{b}{7} \)
7 x (-5b - 4) > b
(7 x -5b) + (7 x -4) > b
-35b - 28 > b
-35b - 28 - b > 0
-35b - b > 28
-36b > 28
b > \( \frac{28}{-36} \)
b > -\(\frac{7}{9}\)
What is the circumference of a circle with a radius of 2?
| 8π | |
| 4π | |
| 1π | |
| 3π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 2)
c = 4π
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.
On this circle, line segment AB is the:
circumference |
|
radius |
|
diameter |
|
chord |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
If a = 4, b = 4, c = 9, and d = 8, what is the perimeter of this quadrilateral?
| 28 | |
| 18 | |
| 25 | |
| 21 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 4 + 4 + 9 + 8
p = 25