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alexandr402 [8]
2 years ago
14

oil and gas prices THe average gasoline price per gallon (in cities) and the cost of a barrel of oil shown below for a random se

lection of weeks in 2015. oil: 87.80, 47.67, 58.03, 53.18, 40.38, 41.06. Gasoline: 3.050, 2.680, 3.044, 2.627, 2.443, 2.349​
Mathematics
1 answer:
Viktor [21]2 years ago
3 0

answer Please my fast Please me

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If f(x)= 3/x+2 - square root of x-3, the domain for f(x) is all real numbers ___ than or equal to 3
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Which mixed number is equivalent to the improper fraction?<br> 11 7
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1 4/7

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11/7

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To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine foun
QveST [7]

Answer:

We conclude that  the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 31.7 milligrams

Sample mean, \bar{x} = 28.5 milligrams

Sample size, n = 9

Alpha, α = 0.05

Sample standard deviation, s =  2.8 milligrams

First, we design the null and the alternate hypothesis

H_{0}: \mu = 31.7\text{ milligrams}\\H_A: \mu < 31.7\text{ milligrams}

We use One-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{28.5 - 31.7}{\frac{2.8}{\sqrt{9}} } = -3.429

Now, t_{critical} \text{ at 0.05 level of significance, 8 degree of freedom } = -1.860

Since,                  

t_{stat} < t_{critical}

We fail to accept the null hypothesis and accept the alternate hypothesis. We conclude that  the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

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3 years ago
Find a negative integer M so that the equation (x-12)(x+m) = m-51​
AleksAgata [21]

Answer:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

Step-by-step explanation:

pls give branliest if helped you im in 6th grade and i know all this bc im smarter then how smart i should be.

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