| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.83 |
| Score | 0% | 77% |
Order the following types of angle from least number of degrees to most number of degrees.
acute, right, obtuse |
|
right, acute, obtuse |
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right, obtuse, acute |
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acute, obtuse, right |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
If side x = 14cm, side y = 12cm, and side z = 9cm what is the perimeter of this triangle?
| 33cm | |
| 35cm | |
| 28cm | |
| 31cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 14cm + 12cm + 9cm = 35cm
Find the value of c:
6c + z = -8
7c + 6z = -9
| -1\(\frac{10}{29}\) | |
| \(\frac{17}{19}\) | |
| -\(\frac{18}{47}\) | |
| -\(\frac{23}{53}\) |
You need to find the value of c so solve the first equation in terms of z:
6c + z = -8
z = -8 - 6c
then substitute the result (-8 - 6c) into the second equation:
7c + 6(-8 - 6c) = -9
7c + (6 x -8) + (6 x -6c) = -9
7c - 48 - 36c = -9
7c - 36c = -9 + 48
-29c = 39
c = \( \frac{39}{-29} \)
c = -1\(\frac{10}{29}\)
If a = 7, b = 8, c = 5, and d = 5, what is the perimeter of this quadrilateral?
| 15 | |
| 27 | |
| 25 | |
| 17 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 7 + 8 + 5 + 5
p = 25
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.)