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Dafna1 [17]
3 years ago
8

Plese help will give crown to best answer!!! 73 points!!! gx =4x +1 when g(3)

Mathematics
2 answers:
Kisachek [45]3 years ago
6 0

X= -1

3x - 4x =1

-1x = 1

X = -1

Lemur [1.5K]3 years ago
5 0
G(3)=13 ,
13 will be answer
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Answer:

k = 15

Step-by-step explanation:

12/4/5 = 4/5/4/5 k

15 = k

OR

5/4 (12) = 4/5 (5/4) k  (multiply by the reciprocal)

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A tugboat goes 72 miles upstream in 9 hours. The return trip downstream takes 4 hours. Find the speed of the tugboat without a c
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4 men and 6 women are ranked according to their scores on an exam. Assume that no two scores are alike, and that all 10! 10 ! po
anygoal [31]

Answer:

a)  P(X=2)=\frac{2}{15}

b) P(X=3)=\frac{1}{30}

c) P(X=6)=0

d)  P(X=9)=0

Step-by-step explanation:

We know that are 4 men and 6 women are ranked according to their scores on an exam.  X = 1 indicates that a man achieved the highest score on the exam.

a) We calculate  P(X=2).  

We calculate the number of possible combinations

C^{10}_{2}=\frac{10!}{2! (10-2)!}=\frac{10\cdot 9\cdot 8!}{2\cdot 1 \cdot 8!}=45

We calculate the number of favorable combinations

C_2^4=\frac{4!}{2!(4-2)!}=6

We get that is

\boxed{P(X=2)=\frac{6}{45}=\frac{2}{15}}

b) We calculate  P(X=3).  

We calculate the number of possible combinations

C^{10}_{3}=\frac{10!}{3! (10-3)!}=\frac{10\cdot 9\cdot 8\cdot 7!}{3\cdot2\cdot 1 \cdot 7!}=120

We calculate the number of favorable combinations

C_3^4=\frac{4!}{3!(4-3)!}=4

We get that is

\boxed{P(X=3)=\frac{4}{120}=\frac{1}{30}}

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We conclude P(X=6)=0.

d) We calculate  P(X=9).  This case is not possible because 9 men cannot be selected because we have been given 4 men.

We conclude P(X=9)=0.

5 0
3 years ago
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