| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
If the ratio of home fans to visiting fans in a crowd is 2:1 and all 41,000 seats in a stadium are filled, how many home fans are in attendance?
| 28,667 | |
| 27,333 | |
| 28,800 | |
| 28,000 |
A ratio of 2:1 means that there are 2 home fans for every one visiting fan. So, of every 3 fans, 2 are home fans and \( \frac{2}{3} \) of every fan in the stadium is a home fan:
41,000 fans x \( \frac{2}{3} \) = \( \frac{82000}{3} \) = 27,333 fans.
Which of the following is a mixed number?
\({7 \over 5} \) |
|
\({5 \over 7} \) |
|
\(1 {2 \over 5} \) |
|
\({a \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
Solve 3 + (2 + 5) ÷ 3 x 2 - 22
| \(\frac{3}{4}\) | |
| 4\(\frac{1}{2}\) | |
| \(\frac{1}{3}\) | |
| 3\(\frac{2}{3}\) |
Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):
3 + (2 + 5) ÷ 3 x 2 - 22
P: 3 + (7) ÷ 3 x 2 - 22
E: 3 + 7 ÷ 3 x 2 - 4
MD: 3 + \( \frac{7}{3} \) x 2 - 4
MD: 3 + \( \frac{14}{3} \) - 4
AS: \( \frac{9}{3} \) + \( \frac{14}{3} \) - 4
AS: \( \frac{23}{3} \) - 4
AS: \( \frac{23 - 12}{3} \)
\( \frac{11}{3} \)
3\(\frac{2}{3}\)
If \( \left|z + 2\right| \) + 3 = 8, which of these is a possible value for z?
| 3 | |
| 0 | |
| 8 | |
| -10 |
First, solve for \( \left|z + 2\right| \):
\( \left|z + 2\right| \) + 3 = 8
\( \left|z + 2\right| \) = 8 - 3
\( \left|z + 2\right| \) = 5
The value inside the absolute value brackets can be either positive or negative so (z + 2) must equal + 5 or -5 for \( \left|z + 2\right| \) to equal 5:
| z + 2 = 5 z = 5 - 2 z = 3 | z + 2 = -5 z = -5 - 2 z = -7 |
So, z = -7 or z = 3.
| 4.2 | |
| 1.6 | |
| 4.0 | |
| 1 |
1