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Xelga [282]
3 years ago
7

What is the sum of (5x−9)+(x−1)

Mathematics
1 answer:
Tpy6a [65]3 years ago
7 0

Step-by-step explanation:

(5x - 9) + (x + 1)

5x - 9 + x + 1 = 0 \\

5x +   x - 9 + 1 = 0

6x - 8 = 0

6 x  = 8

x =  \frac{8}{6}

x =  \frac{4}{3}

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A. C(13, 10) = 13! = 13·12·11 = 13 · 2 · 11 = 286.C(13, 10) = 13! = 13·12·11 = 13 · 2 · 11 = 286.

B. P(13,10)= 13! =13! =13·12·11·10·9·8·7·6·5·4. (13−10)! 3!

C. f there is exactly one woman chosen, this is possible in C(10, 9)C(3, 1) =

10! 3!

9!1! 1!2! 10! 3!

8!2! 2!1! 10! 3!

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= 10 · 3 = 30 ways; two women chosen — in C(10,8)C(3,2) =

= 45·3 = 135 ways; three women chosen — in C(10, 7)C(3, 3) =

= 10·9·8 ·1 = 120 ways. Altogether there are 30+135+120 = 285 1·2·3

<span>possible choices.</span><span> 
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3 years ago
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