| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
Simplify 2a x 9b.
| 11ab | |
| 18ab | |
| 18\( \frac{a}{b} \) | |
| 18a2b2 |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
2a x 9b = (2 x 9) (a x b) = 18ab
If a = c = 4, b = d = 6, what is the area of this rectangle?
| 24 | |
| 42 | |
| 5 | |
| 45 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 4 x 6
a = 24
What is the area of a circle with a radius of 3?
| 9π | |
| 8π | |
| 16π | |
| 64π |
The formula for area is πr2:
a = πr2
a = π(32)
a = 9π
If AD = 25 and BD = 22, AB = ?
| 2 | |
| 20 | |
| 6 | |
| 3 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDWhich of the following is not required to define the slope-intercept equation for a line?
y-intercept |
|
\({\Delta y \over \Delta x}\) |
|
x-intercept |
|
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.