| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 20% off." If Ezra buys two shirts, each with a regular price of $40, how much money will he save?
| $8.00 | |
| $2.00 | |
| $16.00 | |
| $20.00 |
By buying two shirts, Ezra will save $40 x \( \frac{20}{100} \) = \( \frac{$40 x 20}{100} \) = \( \frac{$800}{100} \) = $8.00 on the second shirt.
A triathlon course includes a 500m swim, a 20.8km bike ride, and a 12.100000000000001km run. What is the total length of the race course?
| 33.4km | |
| 44.3km | |
| 64.1km | |
| 57.6km |
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 500 meters to kilometers, divide the distance by 1000 to get 0.5km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.5km + 20.8km + 12.100000000000001km
total distance = 33.4km
Convert b-2 to remove the negative exponent.
| \( \frac{1}{b^2} \) | |
| \( \frac{-2}{b} \) | |
| \( \frac{-1}{b^{-2}} \) | |
| \( \frac{2}{b} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
Which of these numbers is a factor of 48?
| 4 | |
| 18 | |
| 47 | |
| 23 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, 48.
What is the greatest common factor of 68 and 40?
| 18 | |
| 28 | |
| 15 | |
| 4 |
The factors of 68 are [1, 2, 4, 17, 34, 68] and the factors of 40 are [1, 2, 4, 5, 8, 10, 20, 40]. They share 3 factors [1, 2, 4] making 4 the greatest factor 68 and 40 have in common.