Answer:
126
Step-by-step explanation:
n! / (r! (n-r)!)
In this case n = 9 and r = 4
9!/ (4! * (9-4)!)
9!/ (4! * 5!)
= 126
9! = 9x8x7x6x5x4x3x2x1
Answer:
1) No
2) Yes
Step-by-step explanation:
Given : If it took Carlos 30 minutes to cycle from his house to the library yesterday.
To find : Was the distance that he cycled greater than 6 miles?
Solution :
The relation between speed , distance and time is
1) The average speed at which Carlos cycled from his house to the library yesterday was greater than 16 feet per second.
Speed = 16 feet per second
Converting into miles,
Time = 30 minute
Converting into seconds,
The distance he covered is
No, the distance that he cycled is not greater than 6 miles.
2) The average speed at which Carlos cycled from his house to the library yesterday was less than 18 feet per second.
Speed = 18 feet per second
Converting into miles,
Time = 30 minute
Converting into seconds,
The distance he covered is
Yes, the distance that he cycled is greater than 6 miles.
We have to add 4 3/4 to 1/3 and the answer will be 4 4/7