| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.74 |
| Score | 0% | 55% |
If the ratio of home fans to visiting fans in a crowd is 3:1 and all 44,000 seats in a stadium are filled, how many home fans are in attendance?
| 33,000 | |
| 34,500 | |
| 33,333 | |
| 27,750 |
A ratio of 3:1 means that there are 3 home fans for every one visiting fan. So, of every 4 fans, 3 are home fans and \( \frac{3}{4} \) of every fan in the stadium is a home fan:
44,000 fans x \( \frac{3}{4} \) = \( \frac{132000}{4} \) = 33,000 fans.
What is 5\( \sqrt{3} \) x 4\( \sqrt{7} \)?
| 20\( \sqrt{3} \) | |
| 20\( \sqrt{7} \) | |
| 9\( \sqrt{21} \) | |
| 20\( \sqrt{21} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
5\( \sqrt{3} \) x 4\( \sqrt{7} \)
(5 x 4)\( \sqrt{3 \times 7} \)
20\( \sqrt{21} \)
How many 1\(\frac{1}{2}\) gallon cans worth of fuel would you need to pour into an empty 9 gallon tank to fill it exactly halfway?
| 7 | |
| 2 | |
| 6 | |
| 3 |
To fill a 9 gallon tank exactly halfway you'll need 4\(\frac{1}{2}\) gallons of fuel. Each fuel can holds 1\(\frac{1}{2}\) gallons so:
cans = \( \frac{4\frac{1}{2} \text{ gallons}}{1\frac{1}{2} \text{ gallons}} \) = 3
What is the next number in this sequence: 1, 5, 13, 25, 41, __________ ?
| 54 | |
| 60 | |
| 52 | |
| 61 |
The equation for this sequence is:
an = an-1 + 4(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 + 4(6 - 1)
a6 = 41 + 4(5)
a6 = 61
If \( \left|a - 6\right| \) + 9 = -5, which of these is a possible value for a?
| -5 | |
| -2 | |
| -12 | |
| -8 |
First, solve for \( \left|a - 6\right| \):
\( \left|a - 6\right| \) + 9 = -5
\( \left|a - 6\right| \) = -5 - 9
\( \left|a - 6\right| \) = -14
The value inside the absolute value brackets can be either positive or negative so (a - 6) must equal - 14 or --14 for \( \left|a - 6\right| \) to equal -14:
| a - 6 = -14 a = -14 + 6 a = -8 | a - 6 = 14 a = 14 + 6 a = 20 |
So, a = 20 or a = -8.