Mathematics, 02.10.2019 18:30 angelkiss2019
Combinatorics problem. how many permutations of the set [n] are there in which no internal entry is larger that both of its neighbors? (internal = not at the end points) [n] = {1, 2, n-1, n}
can i use the equation:
k! (n-k)! to solve this? i'm not sure how to show the internal entry part of the problem
Answers: 2
Mathematics, 20.06.2019 18:04, andrewisboss59
In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.
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Mathematics, 21.06.2019 16:40, lauramount
According to the number line, what is the distance between points a and b? v ++ + + + + -16 -14 -12 -10 -8 + 6 + 4 + -2 + 0 + 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 o6 units o 7 units 12 units o 14 units
Answers: 1
Mathematics, 22.06.2019 00:30, nataliemoore1974
Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue
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Combinatorics problem. how many permutations of the set [n] are there in which no internal entry is...
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