| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 4.07 |
| Score | 0% | 81% |
A quadrilateral is a shape with __________ sides.
3 |
|
5 |
|
2 |
|
4 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
Solve for a:
-8a + 5 = -3 - 9a
| -\(\frac{1}{4}\) | |
| -8 | |
| \(\frac{3}{4}\) | |
| 1\(\frac{1}{7}\) |
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.
-8a + 5 = -3 - 9a
-8a = -3 - 9a - 5
-8a + 9a = -3 - 5
a = -8
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
pairs |
|
exponents |
|
addition |
|
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 3a - 9a?
| -6a | |
| 27a | |
| 12 | |
| a2 |
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.
3a - 9a = -6a
Simplify 7a x 4b.
| 28\( \frac{b}{a} \) | |
| 28ab | |
| 28a2b2 | |
| 11ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
7a x 4b = (7 x 4) (a x b) = 28ab