| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.50 |
| Score | 0% | 70% |
What is 3a7 + 7a7?
| 10a14 | |
| 21a7 | |
| 10a7 | |
| 21a14 |
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.
3a7 + 7a7 = 10a7
The dimensions of this cube are height (h) = 5, length (l) = 4, and width (w) = 4. What is the surface area?
| 180 | |
| 112 | |
| 222 | |
| 212 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 4 x 4) + (2 x 4 x 5) + (2 x 4 x 5)
sa = (32) + (40) + (40)
sa = 112
Solve for z:
-4z + 9 = -2 - z
| 2 | |
| -\(\frac{5}{8}\) | |
| 3\(\frac{2}{3}\) | |
| -1\(\frac{3}{4}\) |
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.
-4z + 9 = -2 - z
-4z = -2 - z - 9
-4z + z = -2 - 9
-3z = -11
z = \( \frac{-11}{-3} \)
z = 3\(\frac{2}{3}\)
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
addition |
|
pairs |
|
division |
|
exponents |
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.)
Order the following types of angle from least number of degrees to most number of degrees.
right, obtuse, acute |
|
acute, obtuse, right |
|
right, acute, obtuse |
|
acute, right, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.