For the second one, what is the number before the x?
Answer:
7^4
Step-by-step explanation:
7^12 / 7^8
We know that a^b / a^c = a^(b-c)
7^(12-8)
7^4
Answer:
8
Step-by-step explanation:
12-4=8
Answer:
d is the correct answer .
Step-by-step explanation:
I just guessed
Answer:
8820 ways
Step-by-step explanation:
Given that :
Selecting 4 pairs of pant from 8 available and selecting 5 shirts from 9 available
Using combination :
4 pants from 8 = 8C4
5 shirts from 9 = 9C5
Recall:
nCr = n! / (n-r)! r!
8C4 * 9C5 = [8! /(8-4)!4!] * [9! /(9-5)!5!]
8C4 * 9C5 = (8! /4!4!) * (9! /4!5!)
8C4 * 9C5 = 70 * 126
8C4 * 9C5 = 8820 ways
