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Mkey [24]
3 years ago
8

I tried number 7 but didnt get it so i would like for help plz

Mathematics
2 answers:
vfiekz [6]3 years ago
6 0
6f - 5 + 3f = 149.55
9f - 5 = 149.55
5f = 149.55 + 5
9f = 154.55
f = 154.55 / 9
f = 17.172 rounds to $ 17.17 per fish
Nookie1986 [14]3 years ago
5 0
You were close, but I think you thought that after buying 6 fishes, it would be $5 off. I think that for each fish, it is $5 off, with 6 fishes the maximum. 

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lana [24]

The <em><u>correct answer</u></em> is:

c)75.4 to 94.6

Explanation:

The formula for a confidence interval is:

\mu \pm z*(\frac{\sigma}{\sqrt{n}}),

where μ is the mean, z is the z-score associated with the level of confidence we want, σ is the standard deviation, and n is the sample size.

Our mean is 85, our standard deviation is 12, our sample size is 6, and since we want 95% confidence, our z-score is 1.96:

85\pm 1.96(\frac{12}{\sqrt{6}})=85\pm 9.6=85-9.6, 85+9.6=75.4, 94.6

4 0
3 years ago
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Answer:

Half the age of Carlos four years ago is 2 years more than one-third his current age.

Step-by-step explanation:

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Diano4ka-milaya [45]
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