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Alenkasestr [34]
3 years ago
12

Is this proportional? if so what is the constant.

Mathematics
1 answer:
kati45 [8]3 years ago
4 0

Answer: Yes, it’s proportional.

The constant is 300/3 = 100.

Step-by-step explanation:

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4x+9 = -2x-15

Add 2x to each side

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6x+9 = -15

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The base of a cylinder has a radius of 5 cm. What is its area?
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Step-by-step explanation:

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Step-by-step explanation:

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2 years ago
The following data gives the speeds (in mph), as measured by radar, of 10 cars traveling north on I-15. 76 72 80 68 76 74 71 78
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Answer:

71.123 mph ≤ μ ≤ 77.277 mph

Step-by-step explanation:

Taking into account that the speed of all cars traveling on this highway have a normal distribution and we can only know the mean and the standard deviation of the sample, the confidence interval for the mean is calculated as:

m-t_{a/2,n-1}\frac{s}{\sqrt{n} } ≤ μ ≤ m+t_{a/2,n-1}\frac{s}{\sqrt{n} }

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the mean and the standard deviation of the sample are equal to 74.2 and 5.3083 respectively, the size of the sample is 10, the distribution t- student has 9 degrees of freedom and the value of a is 10%.

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