Permutations and combinations, math, Mathematics

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number of ways that a mixed doubles tennis game can be arranged from 7 couples if no husband and wife play in the same game is??

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Binormal vector - three dimensional space, Binormal Vector - Three Dimensio...

Binormal Vector - Three Dimensional Space Next, is the binormal vector.  The binormal vector is illustrated to be, B → (t) = T → (t) * N → (t) Since the binormal vecto

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Solve sin (3t ) = 2 . Solution This example is designed to remind you of certain properties about sine and cosine.  Recall that -1 ≤ sin (θ ) ≤ 1 and -1 ≤ cos(θ ) ≤ 1 .  Th

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1. A machine comprises of three transformers A, B and C. Such machine may operate if at least 2 transformers are working. The probability of each transformer working is given as di

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A payday loan company charges a $95 fee for a $500 payday loan that will be repaid in 11 days. Treating the fee as interest paid, what is the equivalent annual interest rate?

How far is that person from the starting point, A person travels 10 miles d...

A person travels 10 miles due north, 6 miles due west, 4 miles due north, and 12 miles due east. How far is that person from the initail state? a. 23 miles northeast b. 13 mi

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find the equation to the sphere through the circle xsqaure+ysquare+zsquare+=9 , 2x+3y+4z=5

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Q. Definition of Logarithms? Ans. A logarithm to the base a of a number x is the power to which a is raised to get x. In equation format: If x = a y , then log a  x

Geometry, can i get some triangle congruence proofs help?

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What is the integratin of 1/sin2x?, ∫1/sin2x dx = ∫cosec2x dx = 1/2 log[cos...

∫1/sin2x dx = ∫cosec2x dx = 1/2 log[cosec2x - cot2x] + c = 1/2 log[tan x] + c Detailed derivation of ∫cosec x dx = ∫cosec x(cosec x - cot x)/(cosec x - cot x) dx = ∫(cosec 2 x

Estimate whose time was the fastest, Nancy, Jennifer, Alex, and Joy ran a r...

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