| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 50% off." If Monty buys two shirts, each with a regular price of $16, how much money will he save?
| $7.20 | |
| $4.80 | |
| $6.40 | |
| $8.00 |
By buying two shirts, Monty will save $16 x \( \frac{50}{100} \) = \( \frac{$16 x 50}{100} \) = \( \frac{$800}{100} \) = $8.00 on the second shirt.
What is the next number in this sequence: 1, 4, 10, 19, 31, __________ ?
| 50 | |
| 42 | |
| 39 | |
| 46 |
The equation for this sequence is:
an = an-1 + 3(n - 1)
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 3(6 - 1)
a6 = 31 + 3(5)
a6 = 46
What is \( 5 \)\( \sqrt{12} \) + \( 6 \)\( \sqrt{3} \)
| 11\( \sqrt{36} \) | |
| 30\( \sqrt{4} \) | |
| 11\( \sqrt{4} \) | |
| 16\( \sqrt{3} \) |
To add these radicals together their radicands must be the same:
5\( \sqrt{12} \) + 6\( \sqrt{3} \)
5\( \sqrt{4 \times 3} \) + 6\( \sqrt{3} \)
5\( \sqrt{2^2 \times 3} \) + 6\( \sqrt{3} \)
(5)(2)\( \sqrt{3} \) + 6\( \sqrt{3} \)
10\( \sqrt{3} \) + 6\( \sqrt{3} \)
Now that the radicands are identical, you can add them together:
10\( \sqrt{3} \) + 6\( \sqrt{3} \)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?
| 9:8 | |
| 7:1 | |
| 25:2 | |
| 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.
4! = ?
5 x 4 x 3 x 2 x 1 |
|
3 x 2 x 1 |
|
4 x 3 x 2 x 1 |
|
4 x 3 |
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.