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Ierofanga [76]
3 years ago
11

Ricardo lost 6 golf balls ,then lost 4 on the course today.He now has 18 golf balls. How many golf balls did Ricardo have to beg

in with?
Mathematics
2 answers:
alexira [117]3 years ago
5 0
28 is the answer. hope this helps
NemiM [27]3 years ago
5 0

<span><span> </span></span><span>Ricardo lost 6 golf balls ,then lost 4</span>

<span /><span>Total balls lost: 6 + 4 = 10</span>

<span /><span>Total balls now: 18</span>

<span />

<span>
</span><span>18 + 10 = 28</span>

<span />

<span>
</span><span>Ricardo has 28 balls to begin with</span>

<span /><span>
</span><span>Proof:</span><span>
</span><span>28 - 10(lost) = 18 (now)</span><span /><span>
</span>

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Answer:

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Step-by-step explanation:

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The question is incomplete! Complete question along with answer and step by step explanation is provided below.

Question:

Most individuals are aware of the fact that the average annual repair cost for an automobile depends on the age of the automobile. A researcher is interested in finding out whether the variance of the annual repair costs also increases with the age of the automobile. A sample of 26 automobiles 4 years old showed a sample standard deviation for annual repair costs of $120 and a sample of 23 automobiles 2 years old showed a sample standard deviation for annual repair costs of $100. Let 4 year old automobiles be represented by population 1.

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Answer:

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Step-by-step explanation:

Let σ₁² denotes the variance of 4 years old automobiles

Let σ₂² denotes the variance of 2 years old automobiles

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The alternate hypothesis assumes that the variance in annual repair costs is larger for older automobiles.

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Test statistic = 1.44

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df₁ = 26 - 1  

df₁ = 25

The degree of freedom corresponding to 2 years old automobiles is given by

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df₂ = 23 - 1  

df₂ = 22

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p-value = FDIST(F-value, df₁, df₂)

p-value = FDIST(1.44, 25, 22)

p-value = 0.1954

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When the p-value is less than the significance level then we reject the Null hypotheses

p-value < α   (reject H₀)

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p-value > α

0.1954 > 0.01

Since the p-value is greater than the given significance level therefore, we cannot reject the null hypothesis.

We can conclude that there is no sufficient evidence to support the claim that the variance in annual repair costs is larger for older automobiles.

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