By buying two shirts, Monty will save $16 x \( \frac{30}{100} \) = \( \frac{$16 x 30}{100} \) = \( \frac{$480}{100} \) = $4.80 on the second shirt.

So, his total cost will be
$16.00 + ($16.00 - $4.80)
$16.00 + $11.20
$27.20

A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.

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 + 50.9km + 12.8km
total distance = 64.2km

To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 4 are [4, 8, 12, 16, 20, 24, 28, 32, 36, 40] and the first few multiples of 6 are [6, 12, 18, 24, 30, 36, 42, 48, 54, 60]. The first few multiples they share are [12, 24, 36, 48, 60] making 12 the smallest multiple 4 and 6 share.

Next, convert the fractions so each denominator equals the lowest common multiple:

\( \frac{3 x 3}{4 x 3} \) + \( \frac{4 x 2}{6 x 2} \)

\( \frac{9}{12} \) + \( \frac{8}{12} \)

Now, because the fractions share a common denominator, you can add them:

\( \frac{9 + 8}{12} \) = \( \frac{17}{12} \) = 1\(\frac{5}{12}\)

Average speed in miles per hour is the number of miles traveled divided by the number of hours: