| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.73 |
| Score | 0% | 75% |
If a car travels 220 miles in 4 hours, what is the average speed?
| 40 mph | |
| 70 mph | |
| 55 mph | |
| 25 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Latoya scored 90% on her final exam. If each question was worth 2 points and there were 80 possible points on the exam, how many questions did Latoya answer correctly?
| 50 | |
| 36 | |
| 41 | |
| 39 |
Latoya scored 90% on the test meaning she earned 90% of the possible points on the test. There were 80 possible points on the test so she earned 80 x 0.9 = 72 points. Each question is worth 2 points so she got \( \frac{72}{2} \) = 36 questions right.
Which of the following is a mixed number?
\({a \over 5} \) |
|
\({5 \over 7} \) |
|
\({7 \over 5} \) |
|
\(1 {2 \over 5} \) |
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.
11 members of a bridal party need transported to a wedding reception but there are only 2 5-passenger taxis available to take them. How many will need to find other transportation?
| 8 | |
| 6 | |
| 1 | |
| 5 |
There are 2 5-passenger taxis available so that's 2 x 5 = 10 total seats. There are 11 people needing transportation leaving 11 - 10 = 1 who will have to find other transportation.
What is \( \frac{21\sqrt{14}}{3\sqrt{7}} \)?
| 7 \( \sqrt{\frac{1}{2}} \) | |
| \(\frac{1}{7}\) \( \sqrt{2} \) | |
| 7 \( \sqrt{2} \) | |
| 2 \( \sqrt{\frac{1}{7}} \) |
To divide terms with radicals, divide the coefficients and radicands separately:
\( \frac{21\sqrt{14}}{3\sqrt{7}} \)
\( \frac{21}{3} \) \( \sqrt{\frac{14}{7}} \)
7 \( \sqrt{2} \)