| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.10 |
| Score | 0% | 62% |
If a = c = 2, b = d = 9, what is the area of this rectangle?
| 6 | |
| 30 | |
| 18 | |
| 21 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 2 x 9
a = 18
Which of the following is not required to define the slope-intercept equation for a line?
slope |
|
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.
If a = c = 5, b = d = 9, and the blue angle = 73°, what is the area of this parallelogram?
| 48 | |
| 15 | |
| 18 | |
| 45 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 5 x 9
a = 45
Simplify (3a)(5ab) + (7a2)(8b).
| -41ab2 | |
| 71a2b | |
| 41a2b | |
| -41a2b |
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.
(3a)(5ab) + (7a2)(8b)
(3 x 5)(a x a x b) + (7 x 8)(a2 x b)
(15)(a1+1 x b) + (56)(a2b)
15a2b + 56a2b
71a2b
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
|
obtuse, acute |
|
vertical, supplementary |
|
acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).