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grandymaker [24]
3 years ago
10

Huilan's age is two times Thomas's age. The sum of their ages is 27. What is Thomas's age?

Mathematics
1 answer:
Talja [164]3 years ago
6 0

Answer:

pretty sure it’s 13 or 13.5

Step-by-step explanation:

27 divided by 2 is 13.5

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2 years ago
An electrical rm manufactures light bulbs that have a life span that is approximately normally distributed. The population stand
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Answer:

The 't' test statistic = 1.46 < 1.69

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Step-by-step explanation:

Step 1:-

Given population of mean μ = 800

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sample standard deviation 'S' = 45

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Null hypothesis H_{0} =µ  =800

alternative hypothesis  H_{1} = µ ≠ 800

<u>Step 2</u>:-

The 't' test statistic t =  \frac{x-μ}{\frac{sig}{\sqrt{n} } }

                             t = \frac{788-800}{\frac{45}{\sqrt{30} } }

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<u>Step 3</u>:-

The degrees of freedom γ = n-1 = 30-1 =29

From "t" value from table at 0.05 level of significance ( t = 1.69)

The calculated value t = 1.4607 < 1.69

Therefore The null hypothesis H_{0} ' is accepted.

<u>conclusion</u>:-

A sample of 30 bulbs are came found from average µ= 800

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Read 2 more answers
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