| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
The formula for the area of a circle is which of the following?
a = π r |
|
a = π d2 |
|
a = π d |
|
a = π r2 |
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 a part of PEMDAS, the acronym for math order of operations?
division |
|
pairs |
|
exponents |
|
addition |
When solving an equation with two variables, 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.)
If a = c = 5, b = d = 7, and the blue angle = 63°, what is the area of this parallelogram?
| 8 | |
| 35 | |
| 81 | |
| 54 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 5 x 7
a = 35
If c = -2 and x = 9, what is the value of 7c(c - x)?
| -54 | |
| 154 | |
| 84 | |
| 180 |
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.)
7c(c - x)
7(-2)(-2 - 9)
7(-2)(-11)
(-14)(-11)
154
The endpoints of this line segment are at (-2, -2) and (2, 4). What is the slope of this line?
| \(\frac{1}{2}\) | |
| 1 | |
| -\(\frac{1}{2}\) | |
| 1\(\frac{1}{2}\) |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -2) and (2, 4) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(4.0) - (-2.0)}{(2) - (-2)} \) = \( \frac{6}{4} \)