| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
What is 7a - 7a?
| 49a | |
| 14a2 | |
| a2 | |
| 0a |
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.
7a - 7a = 0a
Which of the following is not required to define the slope-intercept equation for a line?
slope |
|
\({\Delta y \over \Delta x}\) |
|
y-intercept |
|
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.
Solve for x:
-6x - 7 < 1 - 9x
| x < -1\(\frac{3}{4}\) | |
| x < 2\(\frac{2}{3}\) | |
| x < -1 | |
| x < -\(\frac{4}{7}\) |
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.
-6x - 7 < 1 - 9x
-6x < 1 - 9x + 7
-6x + 9x < 1 + 7
3x < 8
x < \( \frac{8}{3} \)
x < 2\(\frac{2}{3}\)
If a = c = 2, b = d = 4, and the blue angle = 57°, what is the area of this parallelogram?
| 15 | |
| 20 | |
| 32 | |
| 8 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 2 x 4
a = 8
A quadrilateral is a shape with __________ sides.
3 |
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2 |
|
4 |
|
5 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.