| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
If a car travels 160 miles in 8 hours, what is the average speed?
| 25 mph | |
| 20 mph | |
| 55 mph | |
| 65 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)If \(\left|a\right| = 7\), which of the following best describes a?
a = 7 |
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a = 7 or a = -7 |
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none of these is correct |
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a = -7 |
The absolute value is the positive magnitude of a particular number or variable and is indicated by two vertical lines: \(\left|-5\right| = 5\). In the case of a variable absolute value (\(\left|a\right| = 5\)) the value of a can be either positive or negative (a = -5 or a = 5).
A factor is a positive __________ that divides evenly into a given number.
mixed number |
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improper fraction |
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fraction |
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integer |
A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 50% off." If Ezra buys two shirts, each with a regular price of $27, how much money will he save?
| $13.50 | |
| $6.75 | |
| $4.05 | |
| $10.80 |
By buying two shirts, Ezra will save $27 x \( \frac{50}{100} \) = \( \frac{$27 x 50}{100} \) = \( \frac{$1350}{100} \) = $13.50 on the second shirt.
If the ratio of home fans to visiting fans in a crowd is 2:1 and all 38,000 seats in a stadium are filled, how many home fans are in attendance?
| 28,333 | |
| 25,000 | |
| 36,750 | |
| 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:
38,000 fans x \( \frac{2}{3} \) = \( \frac{76000}{3} \) = 25,333 fans.