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3 years ago

-6x + 8x = -46 A) -23 B) 3.2 C) 12 D) 16

Mathematics

2 answers:

Assoli18 [71]3 years ago

7 0

So the right answer is -23.

Nana76 [90]3 years ago

4 0

Answer:

x = -23

Step-by-step explanation:

to solve this kind of equation , you need to just follow the simple procedure

first consider the positive and negative signs and the next step is to collect the like terms then you divide by the coefficient of x

solution

-6x + 8x = -46

2x = -46

divide both sides by the coefficient of x which is 2

2x/2 = -46/2

x = -23

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Step-by-step explanation:

The formula for binomial distribution is expressed as

P(x = r) = nCr × p^r × q^(n - r)

Where

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n represents the number of trials or sample.

From the information given,

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P(x = 2) = 15C2 × 0.365^2 × 0.635^(15 - 2) = 0.038

P(x = 3) = 15C3 × 0.365^3 × 0.635^(15 - 3) = 0.095

P(x = 4) = 15C4 × 0.365^4 × 0.635^(15 - 4) = 0.16

P(x = 5) = 15C5 × 0.365^5 × 0.635^(15 - 5) = 0.21

k P(X = k)

0 0.0011

1 0.0095

2 0.038

3 0.095

4 0.16

5 0.21

b) mean = np = 15 × 0.365 = 5.475

c) standard deviation = √npq

= √15 × 0.365 × 0.635

= 1.86

d) z = (x - mean)/standard deviation

x = 2

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Answer:

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