| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 4.13 |
| Score | 0% | 83% |
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
exponents |
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pairs |
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addition |
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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.)
What is 7a4 - 4a4?
| 11 | |
| 3 | |
| a48 | |
| 3a4 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
7a4 - 4a4 = 3a4
A(n) __________ is two expressions separated by an equal sign.
expression |
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problem |
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formula |
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equation |
An equation is two expressions separated by an equal sign. The key to solving equations is to 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.
The dimensions of this cube are height (h) = 9, length (l) = 7, and width (w) = 6. What is the volume?
| 315 | |
| 108 | |
| 378 | |
| 200 |
The volume of a cube is height x length x width:
v = h x l x w
v = 9 x 7 x 6
v = 378
If a = 5, b = 5, c = 8, and d = 3, what is the perimeter of this quadrilateral?
| 11 | |
| 21 | |
| 17 | |
| 8 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 5 + 5 + 8 + 3
p = 21