| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
Simplify (8a)(9ab) + (2a2)(6b).
| 84a2b | |
| -60a2b | |
| 60a2b | |
| -60ab2 |
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.
(8a)(9ab) + (2a2)(6b)
(8 x 9)(a x a x b) + (2 x 6)(a2 x b)
(72)(a1+1 x b) + (12)(a2b)
72a2b + 12a2b
84a2b
Simplify 7a x 9b.
| 63a2b2 | |
| 63ab | |
| 16ab | |
| 63\( \frac{b}{a} \) |
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.
7a x 9b = (7 x 9) (a x b) = 63ab
Order the following types of angle from least number of degrees to most number of degrees.
right, acute, obtuse |
|
acute, obtuse, right |
|
acute, right, obtuse |
|
right, obtuse, acute |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
If a = c = 5, b = d = 9, what is the area of this rectangle?
| 42 | |
| 72 | |
| 45 | |
| 24 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 5 x 9
a = 45
Which of the following is not required to define the slope-intercept equation for a line?
slope |
|
x-intercept |
|
y-intercept |
|
\({\Delta y \over \Delta x}\) |
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.