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Dmitrij [34]
3 years ago
13

Which expresion is equivalent to 30(1/2x-2)+40(3/4y-4)

Mathematics
1 answer:
Dafna11 [192]3 years ago
6 0

Answer:

15x +30y -220

steps:

30(1/2x-2)+40(3/4y-4)

= 15x-60 +30y-160

= 15x +30y -220

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The probability that a single radar set will detect an enemy plane is 0.9. if we have five radar sets, what is the probability t
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The probability that a single radar set will detect an enemy plane is 0.9. if we have five radar sets, what is the probability that exactly four sets will detect the plane?

Solution: The given random experiment follows binomial distribution with p=0.9,n=5

Let x be the number of radar sets that will detect the plane.

We have to find P(x=4)

P(x=4)=\binom{5}{4}0.9^{4}(1-0.9)^{5-4}      

               =5\times 0.6561 \times 0.1

               =0.3281

Therefore, the probability that exactly four sets will detect the plane is 0.3281

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3 years ago
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liberstina [14]

Answer:

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Step-by-step explanation:

Apply algebra to the equation by subtracting 4 from each side, that way it will cancel out at least the 4 next to p. It should now look like this: p = -3

Because we can't make anymore moves and the expression clearly states what p is, we're done!

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3 years ago
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A histogram is applied when the data is discrete/ continuous to present a visual understanding of the data by showing the number of data set fitting is a specified range.

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