| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.68 |
| Score | 0% | 74% |
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
addition |
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pairs |
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exponents |
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division |
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 = 8, b = 3, c = 1, and d = 7, what is the perimeter of this quadrilateral?
| 15 | |
| 27 | |
| 21 | |
| 19 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 8 + 3 + 1 + 7
p = 19
Factor y2 - 3y - 28
| (y - 7)(y - 4) | |
| (y - 7)(y + 4) | |
| (y + 7)(y + 4) | |
| (y + 7)(y - 4) |
To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce -28 as well and sum (Inside, Outside) to equal -3. For this problem, those two numbers are -7 and 4. Then, plug these into a set of binomials using the square root of the First variable (y2):
y2 - 3y - 28
y2 + (-7 + 4)y + (-7 x 4)
(y - 7)(y + 4)
Which types of triangles will always have at least two sides of equal length?
equilateral, isosceles and right |
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isosceles and right |
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equilateral and right |
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equilateral and isosceles |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
Which of the following expressions contains exactly two terms?
binomial |
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quadratic |
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polynomial |
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monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.