Answer:
Reduce each side by 1/3, 9m would be 3m, 12m would be 4m, 15m would be 5m.
Step-by-step explanation:
To make a triangle a fraction smaller (such as 1/3, 1/4, or 1/6) just multiply the sides by the fraction. To make a triangle a fraction bigger, multiply it by the sides but then add the solution to the original triangle to get a triangle a fraction bigger.
8 “choose” 5 = (8! / 5! x (8 - 5) ! )
8 “choose” 5 = (8! / 3! x 5!)
= (8 x 7 x 6 x 5 x 4 x 3 x 2 x 1) /
(5 x 4 x 3 x 2 x 1) /
(3 x 2 x 1)
= (8 x 7 x 6) /
(3 x 2 x 1)
= ( 7 x 4 x 2) = 56
Therefore there are 56 ways 5 singers can be selected from 8 that came to an audition.