This is the concept of combination, the number of ways 4 different color can be chosen from 9 different colors will be:
9C4
=(9!)/(4!(9-4)!)
=362,880/(24×120)
=362,880/2880
=126
thus the number of ways is 126 ways
Answer:
m = 9
Step-by-step explanation:
-2m + 8 + m + 1 = 0
-m + 9 = 0
9 = m
5 would be the right answer.
Answer:
72 houses.
Step-by-step explanation:
We are told that a postal worker can deliver the mail to 18 houses in 15 minutes.
Let us find numbers of mails delivered by postal worker per minute.


Since we know that 1 hour equals 60 minutes, so we will multiply 1.2 by 60 to find the number mails postal worker will deliver in 1 hour.


Therefore, the postal worker will be able to deliver mails to 72 houses in 1 hour.
Answer:
.66666666666666666666666666666666666666667
Step-by-step explanation:

This is just 0.6666 repeating to symbolize repeating put a dash over the last 6.