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Nadusha1986 [10]
3 years ago
6

How do I solve for c and y 72x+84y=4920

Mathematics
1 answer:
Aleksandr [31]3 years ago
3 0

Answer:

y = -6/7 + 410/7

(y = mx + c)

Step-by-step explanation:

72x + 84y = 4920

84y = -72x + 4920

y = -6/7 + 410/7

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3 years ago
A direct mail appeal for contributions from a university's alumni is considered effective if more than 15% of the alumni provide
Ymorist [56]

Answer:

We want to verify if the true proportion of the alumni provide monetary contributions is higher than 0.15 (Alternative hypothesis), the system of hypothesis are.:  

Null hypothesis:p \leq 0.15  

Alternative hypothesis:p > 0.15  

And the best answer for this case would be:

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Step-by-step explanation:

Information given

n=250 represent the random sample taken

X=40 represent the number of people on the alumni mailing list

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p_o=0.15 is the value to verify

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to verify if the true proportion of the alumni provide monetary contributions is higher than 0.15 (Alternative hypothesis), the system of hypothesis are.:  

Null hypothesis:p \leq 0.15  

Alternative hypothesis:p > 0.15  

And the best answer for this case would be:

Ha: p > 0.15

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