| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
What is \( \frac{35\sqrt{25}}{5\sqrt{5}} \)?
| 5 \( \sqrt{\frac{1}{7}} \) | |
| 7 \( \sqrt{5} \) | |
| \(\frac{1}{5}\) \( \sqrt{7} \) | |
| \(\frac{1}{7}\) \( \sqrt{\frac{1}{5}} \) |
To divide terms with radicals, divide the coefficients and radicands separately:
\( \frac{35\sqrt{25}}{5\sqrt{5}} \)
\( \frac{35}{5} \) \( \sqrt{\frac{25}{5}} \)
7 \( \sqrt{5} \)
Simplify \( \sqrt{12} \)
| 5\( \sqrt{3} \) | |
| 4\( \sqrt{3} \) | |
| 9\( \sqrt{6} \) | |
| 2\( \sqrt{3} \) |
To simplify a radical, factor out the perfect squares:
\( \sqrt{12} \)
\( \sqrt{4 \times 3} \)
\( \sqrt{2^2 \times 3} \)
2\( \sqrt{3} \)
4! = ?
5 x 4 x 3 x 2 x 1 |
|
3 x 2 x 1 |
|
4 x 3 |
|
4 x 3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
A sports card collection contains football, baseball, and basketball cards. If the ratio of football to baseball cards is 5 to 2 and the ratio of baseball to basketball cards is 5 to 1, what is the ratio of football to basketball cards?
| 9:4 | |
| 25:2 | |
| 3:1 | |
| 3:4 |
The ratio of football cards to baseball cards is 5:2 and the ratio of baseball cards to basketball cards is 5:1. To solve this problem, we need the baseball card side of each ratio to be equal so we need to rewrite the ratios in terms of a common number of baseball cards. (Think of this like finding the common denominator when adding fractions.) The ratio of football to baseball cards can also be written as 25:10 and the ratio of baseball cards to basketball cards as 10:2. So, the ratio of football cards to basketball cards is football:baseball, baseball:basketball or 25:10, 10:2 which reduces to 25:2.
What is -9y2 x 4y2?
| -5y2 | |
| -36y4 | |
| -5y4 | |
| -36y2 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
-9y2 x 4y2
(-9 x 4)y(2 + 2)
-36y4