| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
If BD = 25 and AD = 27, AB = ?
| 1 | |
| 18 | |
| 2 | |
| 13 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDWhat is the circumference of a circle with a diameter of 17?
| 8π | |
| 26π | |
| 17π | |
| 12π |
The formula for circumference is circle diameter x π:
c = πd
c = 17π
The formula for the area of a circle is which of the following?
a = π d |
|
a = π r2 |
|
a = π d2 |
|
a = π r |
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.
Which of the following is not required to define the slope-intercept equation for a line?
y-intercept |
|
slope |
|
\({\Delta y \over \Delta x}\) |
|
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.
Simplify (2a)(5ab) - (7a2)(6b).
| -32a2b | |
| 52ab2 | |
| 91a2b | |
| 32ab2 |
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)(5ab) - (7a2)(6b)
(2 x 5)(a x a x b) - (7 x 6)(a2 x b)
(10)(a1+1 x b) - (42)(a2b)
10a2b - 42a2b
-32a2b