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Furkat [3]
2 years ago
12

Solve for x. 21x + 11 - 5 = 5

Mathematics
2 answers:
nydimaria [60]2 years ago
6 0

Answer:

x=-1

Step-by-step explanation:

21x+11-5=5

21x+6=5

     -6  -6

21x=-1

21    21

x=-1

Reil [10]2 years ago
3 0

Answer:

x= -1/21

Step-by-step explanation:

21x + 11 - 5 = 5

21x + 6 = 5

(-6 each side)

21x = -1

(divide 21 each side)

x= -1/21

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Answer:

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Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $60,000

Standard Deviation, σ = $5,000

Sample size, n = 100

a) 90% critical values

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Putting the values, we get,

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60000 \pm 1.64(\frac{5000}{\sqrt{100}} ) = 60000 \pm 820 = (59180,60820)

b) 95% critical values

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Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

60000 \pm 1.96(\frac{5000}{\sqrt{100}} ) = 60000 \pm 980= (59020,60980)

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