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2 years ago

4.8/2z+15=0.2/5 Plz help I am only 8

Mathematics

2 answers:

kakasveta [241]2 years ago

8 0

Answer: z = 247.5

Step-by-step explanation:

4.8/2z+15=0.2/5 To eliminate the denominators, multiply both sides by their reciprocals.

2z(5)(4.8/2z+15)=2z(5)(0.2/5) Denominators "cancel." Distribute 5(4.8 + 15)

24 + 75 = 2z(0.2) Simplify: Add 24+75=99 and Multiply 2z×0.2= 0.4z

99 = 0.4z . Divide both sides by 0.4

99/0.4 = 0.4z/0.4 . 0.4 "cancels" on the right. dividing by a decimal is like multiplying by its reciprocal, 10/4 × 99

247.5 = z

yaroslaw [1]2 years ago

3 0

Answer:

z=−6.233333

Step-by-step explanation:

4.8

z+15=

0.2

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Hi there!

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3 years ago

A simple random sample of size nequals10 is obtained from a population with muequals68 and sigmaequals15. (a) What must be true

valentina_108 [34]

Answer:

(a) The distribution of the sample mean ( $\bar x$ ) is N (68, 4.74²).

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A random sample of size n = 10 is selected from a population.

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(a)

According to the Central Limit Theorem if we have a population with mean μ and standard deviation σ and we take appropriately huge random samples (n ≥ 30) from the population with replacement, then the distribution of the sample mean will be approximately normally distributed.

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$\mu_{\bar x}=\mu=68$