| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.76 |
| Score | 0% | 75% |
What is 9a9 - 7a9?
| a918 | |
| 2a18 | |
| 2a9 | |
| 2 |
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.
9a9 - 7a9 = 2a9
A quadrilateral is a shape with __________ sides.
5 |
|
4 |
|
2 |
|
3 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
What is 5a7 + 9a7?
| 14a7 | |
| -4 | |
| 14 | |
| -4a14 |
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.
5a7 + 9a7 = 14a7
Simplify 2a x 3b.
| 6\( \frac{a}{b} \) | |
| 6\( \frac{b}{a} \) | |
| 6ab | |
| 6a2b2 |
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.
2a x 3b = (2 x 3) (a x b) = 6ab
The dimensions of this trapezoid are a = 6, b = 8, c = 8, d = 7, and h = 5. What is the area?
| 10 | |
| 37\(\frac{1}{2}\) | |
| 19\(\frac{1}{2}\) | |
| 20 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(8 + 7)(5)
a = ½(15)(5)
a = ½(75) = \( \frac{75}{2} \)
a = 37\(\frac{1}{2}\)