3 years ago

For what value of x is the rational expression below when x is equal to 4? X+20/x+4

Mathematics

1 answer:

arlik [135]3 years ago

7 0

x+20/x+4

↓

4+20/4+4

↓

4+5+4=13

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A quality control engineer at a potato chip company tests the bag filling machine by weighing bags of potato chips. Not every ba

Ahat [919]

Answer:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

Step-by-step explanation:

Information provided

n=100 represent the random sample taken

X=21 represent the number of bags overfilled

$\hat p=\frac{21}{100}=0.21$ estimated proportion of overfilled bags

$p_o=0.15$ is the value that we want to test

z would represent the statistic

Hypothesis

We need to conduct a hypothesis in order to test if the true proportion of overfilled bags is higher than 0.15.:

Null hypothesis: $p =0.7$

Alternative hypothesis: $p > 0.15$

The statistic for this case is:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

And replacing the info given we got:

$z=\frac{0.21 -0.15}{\sqrt{\frac{0.15(1-0.15)}{100}}}=1.68$

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3 years ago

You say me when you start at 21 and count by tens. I am after 91. I am before 111. What number am i?

babunello [35]

Answer:

101

Step-by-step explanation: it is before 111 and after 91

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Answer:

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How do you solve 3^(4x) = 3^(5-x)?

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Bello you have a great day

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You too !! .......... :)

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