| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
What is the area of a circle with a radius of 5?
| 6π | |
| 4π | |
| 49π | |
| 25π |
The formula for area is πr2:
a = πr2
a = π(52)
a = 25π
Which of the following is not required to define the slope-intercept equation for a line?
x-intercept |
|
y-intercept |
|
\({\Delta y \over \Delta x}\) |
|
slope |
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.
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
|
right angle |
|
equal length |
|
parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
The formula for the area of a circle is which of the following?
a = π r2 |
|
a = π d |
|
a = π r |
|
a = π d2 |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
Solve for x:
-7x + 3 = 6 - 6x
| \(\frac{2}{7}\) | |
| -3 | |
| 1 | |
| 2\(\frac{1}{3}\) |
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 equal sign and the answer on the other.
-7x + 3 = 6 - 6x
-7x = 6 - 6x - 3
-7x + 6x = 6 - 3
-x = 3
x = \( \frac{3}{-1} \)
x = -3