| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
The formula for the area of a circle is which of the following?
a = π d |
|
a = π r |
|
a = π r2 |
|
a = π d2 |
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.
If a = c = 4, b = d = 8, and the blue angle = 70°, what is the area of this parallelogram?
| 32 | |
| 30 | |
| 12 | |
| 72 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 4 x 8
a = 32
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
exponents |
|
pairs |
|
division |
|
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.)
Solve for z:
4z - 3 < 4 - 7z
| z < \(\frac{7}{11}\) | |
| z < 6 | |
| z < -2 | |
| z < \(\frac{5}{8}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the < sign and the answer on the other.
4z - 3 < 4 - 7z
4z < 4 - 7z + 3
4z + 7z < 4 + 3
11z < 7
z < \( \frac{7}{11} \)
z < \(\frac{7}{11}\)
If angle a = 36° and angle b = 41° what is the length of angle c?
| 79° | |
| 87° | |
| 103° | |
| 117° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 36° - 41° = 103°