| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
What is the distance in miles of a trip that takes 7 hours at an average speed of 75 miles per hour?
| 525 miles | |
| 315 miles | |
| 480 miles | |
| 75 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 = \( 75mph \times 7h \)
525 miles
How many 7-passenger vans will it take to drive all 54 members of the football team to an away game?
| 17 vans | |
| 4 vans | |
| 8 vans | |
| 5 vans |
Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:
vans = \( \frac{54}{7} \) = 7\(\frac{5}{7}\)
So, it will take 7 full vans and one partially full van to transport the entire team making a total of 8 vans.
The total water usage for a city is 25,000 gallons each day. Of that total, 16% is for personal use and 34% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 4,000 | |
| 10,800 | |
| 4,500 | |
| 2,200 |
34% of the water consumption is industrial use and 16% is personal use so (34% - 16%) = 18% more water is used for industrial purposes. 25,000 gallons are consumed daily so industry consumes \( \frac{18}{100} \) x 25,000 gallons = 4,500 gallons.
If \( \left|y - 4\right| \) + 9 = 1, which of these is a possible value for y?
| -16 | |
| 12 | |
| 8 | |
| 17 |
First, solve for \( \left|y - 4\right| \):
\( \left|y - 4\right| \) + 9 = 1
\( \left|y - 4\right| \) = 1 - 9
\( \left|y - 4\right| \) = -8
The value inside the absolute value brackets can be either positive or negative so (y - 4) must equal - 8 or --8 for \( \left|y - 4\right| \) to equal -8:
| y - 4 = -8 y = -8 + 4 y = -4 | y - 4 = 8 y = 8 + 4 y = 12 |
So, y = 12 or y = -4.
How many 2 gallon cans worth of fuel would you need to pour into an empty 20 gallon tank to fill it exactly halfway?
| 10 | |
| 9 | |
| 7 | |
| 5 |
To fill a 20 gallon tank exactly halfway you'll need 10 gallons of fuel. Each fuel can holds 2 gallons so:
cans = \( \frac{10 \text{ gallons}}{2 \text{ gallons}} \) = 5