| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
Order the following types of angle from least number of degrees to most number of degrees.
acute, obtuse, right |
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acute, right, obtuse |
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right, obtuse, acute |
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right, acute, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
division |
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exponents |
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addition |
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pairs |
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.)
What is the area of a circle with a diameter of 8?
| 16π | |
| 9π | |
| 25π | |
| 81π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{8}{2} \)
r = 4
a = πr2
a = π(42)
a = 16π
A(n) __________ is to a parallelogram as a square is to a rectangle.
quadrilateral |
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trapezoid |
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rhombus |
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triangle |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
Solve 4a + a = 9a - 2z - 6 for a in terms of z.
| -\(\frac{3}{14}\)z + \(\frac{2}{7}\) | |
| \(\frac{3}{5}\)z + 1\(\frac{1}{5}\) | |
| -\(\frac{1}{3}\)z - \(\frac{2}{15}\) | |
| -\(\frac{1}{2}\)z + \(\frac{1}{2}\) |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
4a + z = 9a - 2z - 6
4a = 9a - 2z - 6 - z
4a - 9a = -2z - 6 - z
-5a = -3z - 6
a = \( \frac{-3z - 6}{-5} \)
a = \( \frac{-3z}{-5} \) + \( \frac{-6}{-5} \)
a = \(\frac{3}{5}\)z + 1\(\frac{1}{5}\)