| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
If angle a = 59° and angle b = 49° what is the length of angle c?
| 99° | |
| 65° | |
| 51° | |
| 72° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 59° - 49° = 72°
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 y:
6y - 2 = -1 - 4y
| -3 | |
| \(\frac{1}{10}\) | |
| 7 | |
| -1\(\frac{1}{3}\) |
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 equal sign and the answer on the other.
6y - 2 = -1 - 4y
6y = -1 - 4y + 2
6y + 4y = -1 + 2
10y = 1
y = \( \frac{1}{10} \)
y = \(\frac{1}{10}\)
For this diagram, the Pythagorean theorem states that b2 = ?
c - a |
|
c2 - a2 |
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c2 + a2 |
|
a2 - c2 |
The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)
What is the circumference of a circle with a diameter of 13?
| 30π | |
| 13π | |
| 15π | |
| 34π |
The formula for circumference is circle diameter x π:
c = πd
c = 13π