| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.94 |
| Score | 0% | 79% |
What is the distance in miles of a trip that takes 4 hours at an average speed of 20 miles per hour?
| 20 miles | |
| 315 miles | |
| 80 miles | |
| 55 miles |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Solving for distance:
distance = \( \text{speed} \times \text{time} \)
distance = \( 20mph \times 4h \)
80 miles
If a car travels 30 miles in 1 hour, what is the average speed?
| 65 mph | |
| 30 mph | |
| 50 mph | |
| 20 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)What is 4b6 - 2b6?
| 2b6 | |
| 6b-12 | |
| 6b12 | |
| 2b-6 |
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:
4b6 - 2b6
(4 - 2)b6
2b6
Find the average of the following numbers: 14, 8, 14, 8.
| 10 | |
| 11 | |
| 15 | |
| 14 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{14 + 8 + 14 + 8}{4} \) = \( \frac{44}{4} \) = 11
What is the greatest common factor of 60 and 72?
| 32 | |
| 43 | |
| 24 | |
| 12 |
The factors of 60 are [1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60] and the factors of 72 are [1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72]. They share 6 factors [1, 2, 3, 4, 6, 12] making 12 the greatest factor 60 and 72 have in common.