| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.80 |
| Score | 0% | 56% |
If the ratio of home fans to visiting fans in a crowd is 2:1 and all 44,000 seats in a stadium are filled, how many home fans are in attendance?
| 20,667 | |
| 21,333 | |
| 29,333 | |
| 25,333 |
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:
44,000 fans x \( \frac{2}{3} \) = \( \frac{88000}{3} \) = 29,333 fans.
What is \( \frac{-9z^7}{7z^4} \)?
| -\(\frac{7}{9}\)z11 | |
| -1\(\frac{2}{7}\)z1\(\frac{3}{4}\) | |
| -1\(\frac{2}{7}\)z\(\frac{4}{7}\) | |
| -1\(\frac{2}{7}\)z3 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{-9z^7}{7z^4} \)
\( \frac{-9}{7} \) z(7 - 4)
-1\(\frac{2}{7}\)z3
What is -4b4 x 9b5?
| -36b9 | |
| -36b | |
| 5b5 | |
| -36b-1 |
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:
-4b4 x 9b5
(-4 x 9)b(4 + 5)
-36b9
On average, the center for a basketball team hits 35% of his shots while a guard on the same team hits 45% of his shots. If the guard takes 10 shots during a game, how many shots will the center have to take to score as many points as the guard assuming each shot is worth the same number of points?
| 9 | |
| 16 | |
| 11 | |
| 8 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 10 x \( \frac{45}{100} \) = \( \frac{45 x 10}{100} \) = \( \frac{450}{100} \) = 4 shots
The center makes 35% of his shots so he'll have to take:
shots made = shots taken x \( \frac{\text{% made}}{100} \)
shots taken = \( \frac{\text{shots taken}}{\frac{\text{% made}}{100}} \)
to make as many shots as the guard. Plugging in values for the center gives us:
center shots taken = \( \frac{4}{\frac{35}{100}} \) = 4 x \( \frac{100}{35} \) = \( \frac{4 x 100}{35} \) = \( \frac{400}{35} \) = 11 shots
to make the same number of shots as the guard and thus score the same number of points.
| 1 | |
| 3.5 | |
| 1.5 | |
| 1.8 |
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