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3 years ago

there are 40 black balls this is 4 more than twice the number of yellow balls how many yellow boll are there

Mathematics

2 answers:

miss Akunina [59]3 years ago

8 0

Answer:

There are 5 yellow balls

Step-by-step explanation:

40/4 = 10

10/2 = 5

rosijanka [135]3 years ago

4 0

Answer: 18
explanation: “40 black balls this is 4 more” so it’s “40-6=36”
and then “twice more” would be dividing in half so “36/2=18”

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Maurinko [17]

Answer:

The 99% of a confidence interval for the average maximum HP for the experimental engine.

(536.46, 603.54)

Step-by-step explanation:

Step:-1

Given that the mean of the Population = 540HP

Given that the size of the sample 'n' = 9

Given that the mean of the sample = 570HP

Given that the sample standard deviation = 30HP

Step(ii):-

Degrees of freedom = n-1 =9-1 =8

t₀.₀₀₅ = 3.3554

The 99% of a confidence interval for the average maximum HP for the experimental engine.

$(x^{-} - t_{\frac{0.01}{2} ,8} \frac{S.D}{\sqrt{n} } ,x^{2} + t_{\frac{0.01}{2},8 } \frac{S.D}{\sqrt{n} } )$

$(570-3.354\frac{30}{\sqrt{9} } , 570+3.354\frac{30}{\sqrt{9} } )$

(570 - 33.54 , 570+33.54)

(536.46 , 603.54)

Final answer :-

The 99% of a confidence interval for the average maximum HP for the experimental engine.

(536.46, 603.54)

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there are 40 black balls this is 4 more than twice the number of yellow balls how many yellow boll are there​

there are 40 black balls this is 4 more than twice the number of yellow balls how many yellow boll are there