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3 years ago

Show your work 7(x-8)=2x-31

Mathematics

1 answer:

victus00 [196]3 years ago

3 0

Answer:

x=5

Step-by-step explanation:

7 (x-8)=2x-31

Distribute the 7 to the x and -8 (basically multiple 7 with the x and -8)

7x-56=2x -31

Drag the 2x over to the other subtracting it from 7x.

7x-2x-56=-31

5x-56=-31

Drag the 56 to the other side and add it to -31

5x= -31+56 (or 56-31)

5x= 25

Divide 5x from 25 to get your X

x=25/5

x=5

Hope this helps!!

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Answer:

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Step-by-step explanation:

We are given that Karri takes a 7 question true-false test and guess on every question.

The above situation can be represented through binomial distribution;

$P(X = r) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r} ; x = 0,1,2,3,........$

where, n = number of samples (trials) taken = 7 question

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p = probability of success which in our question is probability that

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Let X = Number of question that are correct

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Now, the probability that she gets all 7 questions correct is given by = P(X = 7)

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a secant and tangent are drawn to a circle from a common exterior point. If the length is 14 inches and the length of the extern

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Answer:

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