P(n, r) = n!
____
(n-r)!
= 8!
____
(8-1)!
= 8
The number 6.9 is already rounded to the nearest tenth.
Answer:
see attached formulas
Step-by-step explanation:
Math is beautiful. Have fun learning.
Answer:
15 and 108
Step-by-step explanation:
3*(30-25)=3*5=15
4*(12+15)=4*27=108