| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
If the base of this triangle is 4 and the height is 8, what is the area?
| 78 | |
| 35 | |
| 16 | |
| 40 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 8 = \( \frac{32}{2} \) = 16
A trapezoid is a quadrilateral with one set of __________ sides.
right angle |
|
equal length |
|
equal angle |
|
parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
Simplify 3a x 4b.
| 12ab | |
| 12\( \frac{b}{a} \) | |
| 12\( \frac{a}{b} \) | |
| 7ab |
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 x 4b = (3 x 4) (a x b) = 12ab
If b = 7 and y = 9, what is the value of -b(b - y)?
| 96 | |
| -162 | |
| 320 | |
| 14 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
-b(b - y)
-1(7)(7 - 9)
-1(7)(-2)
(-7)(-2)
14
Which of the following is not required to define the slope-intercept equation for a line?
\({\Delta y \over \Delta x}\) |
|
x-intercept |
|
slope |
|
y-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.