| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
On average, the center for a basketball team hits 25% of his shots while a guard on the same team hits 35% 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?
| 13 | |
| 12 | |
| 15 | |
| 10 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 10 x \( \frac{35}{100} \) = \( \frac{35 x 10}{100} \) = \( \frac{350}{100} \) = 3 shots
The center makes 25% 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 = \( \frac{3}{\frac{25}{100}} \) = 3 x \( \frac{100}{25} \) = \( \frac{3 x 100}{25} \) = \( \frac{300}{25} \) = 12 shots
to make the same number of shots as the guard and thus score the same number of points.
Simplify \( \frac{28}{68} \).
| \( \frac{5}{9} \) | |
| \( \frac{7}{17} \) | |
| \( \frac{6}{19} \) | |
| \( \frac{5}{16} \) |
To simplify this fraction, first find the greatest common factor between them. The factors of 28 are [1, 2, 4, 7, 14, 28] and the factors of 68 are [1, 2, 4, 17, 34, 68]. They share 3 factors [1, 2, 4] making 4 their greatest common factor (GCF).
Next, divide both numerator and denominator by the GCF:
\( \frac{28}{68} \) = \( \frac{\frac{28}{4}}{\frac{68}{4}} \) = \( \frac{7}{17} \)
A triathlon course includes a 100m swim, a 50.7km bike ride, and a 9.5km run. What is the total length of the race course?
| 40.1km | |
| 53.7km | |
| 60.3km | |
| 38.9km |
To add these distances, they must share the same unit so first you need to first convert the swim distance from meters (m) to kilometers (km) before adding it to the bike and run distances which are already in km. To convert 100 meters to kilometers, divide the distance by 1000 to get 0.1km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.1km + 50.7km + 9.5km
total distance = 60.3km
What is -5y7 - 9y7?
| 4y14 | |
| -14y-7 | |
| -14y7 | |
| 14y7 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-5y7 - 9y7
(-5 - 9)y7
-14y7
What is \( \frac{45\sqrt{56}}{9\sqrt{8}} \)?
| 5 \( \sqrt{7} \) | |
| \(\frac{1}{5}\) \( \sqrt{\frac{1}{7}} \) | |
| 7 \( \sqrt{5} \) | |
| \(\frac{1}{7}\) \( \sqrt{5} \) |
To divide terms with radicals, divide the coefficients and radicands separately:
\( \frac{45\sqrt{56}}{9\sqrt{8}} \)
\( \frac{45}{9} \) \( \sqrt{\frac{56}{8}} \)
5 \( \sqrt{7} \)