Hello!
₉P₄ means the number of permutations of 9 objects chosen 4 at a time.
<span>This is 9! / (9-4)! = 362,880 / 120 = 3024.
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nPr = n!/(n-r)!
<span>nCr = n!/(n-r)!r!
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<span>So as said, in this case its 9P4=9!\5!=9*8*7*6=3024
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Hope this Helps! Have A Wonderful Day! :)
Answer:
14, 28, 42, 56, and 70 are the first 5 common multiples of 14
20, 40, 60, 80, and 100 are the first 4 common multiples of 20
Answer:
The distance between the airplane and the airport is:
Step-by-step explanation:
We can use the Pythagoras theorem to find the distance from the airplane to the airport.
The equation is:
Where:
- <u>a represents the elevations of the airplane (15000 feet)</u>
- <u>b is the distance from the ground directly below the airplane to the airport (6 miles)</u>
- <u>c is the distance between the airplane and the airport.</u>
We need first to convert 15000 feet in miles.
Therefore, c will be:
I hope it helps you!
The pelican is 16 feet ABOVE the water, then dives 20 feet to get to the fish. Basically, just do 20 minus 16, which would be 4 feet. So the pelican is 4 feet below sea level.
Step-by-step explanation:
substitute the value of y in terms of x
-2x - 3(6x-11)= -7
-2x - 18x+ 33=-7
-20x= -40
x = -40/-20
x= 2
substitute x=2 in first equation
y= 12-11
y= 1