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xxMikexx [17]
3 years ago
6

4 times the difference of 4 and a number is 24

Mathematics
1 answer:
Len [333]3 years ago
6 0

Answer:

10

Step-by-step explanation:

Let "a number" = x

4(x - 4) = 24

Isolate the x. First, divide 4 from both sides

(4(x -4))/4 = (24)/4

x - 4 = 6

Add 4 to both sides

x - 4 (+4) = 6 (+4)

x = 6 + 4

x = 10

10 is your answer for "a number"

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From an industrial area 70 companies were selected at random and 45 of them were panning for expansion next year. Find 95% confi
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Answer:

Confidence limit = [52.8%, 75.2%]

Step-by-step explanation:

P=\frac{45}{70}= 0.64

(1-P)=1-0.64=0.36

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P ± z \sqrt{\frac{P(1-P)}{n} }

where the value z will be taken from the z-table for 95% confidence interval

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From the z-table the value of z corresponding to 0.0975 is 1.96

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