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3 years ago

Which expression is equivalent to 12 1/5 - ( 22 2/5 ) - ( 40 1/5 ) ?

Mathematics

1 answer:

RideAnS [48]3 years ago

4 0

Answer:

-50 2/5.

Step-by-step explanation:

First subtract the whole numbers:

12 - 22 - 40

= -50.

Next the fractions:

1/5 - 2/5 - 1/5

= -2/5

So the answer is -50 2/5.

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Step-by-step explanation:

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3 years ago

Solve ax-b/d=c, for x

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Answer:

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ax - b / d = c

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3 years ago

Evaluate the expression (ab)2 for a = 2 and b = 5.

kirill [66]

Answer:

-50

Step-by-step explanation:

First, we must know that ab is the same as:

ab is the same as a multiply b

Now, since a is given as -5, we can substitute a with -5. This is shown below:

substitute ab with -5

Similarly, b is given as 10. So, we can substitute b with 10:

substitute b with 10

With this, we can now evaluate ab as shown below:

ab is equal to -50

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2 years ago

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3 years ago

An inspector inspects large truckloads of potatoes to determine the proportion p in the shipment with major defects prior to usi

anastassius [24]

Answer:

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

Replacing the info given we got:

$z=\frac{0.06-0.10}{\sqrt{\frac{0.10(1-0.10)}{200}}}=-1.89$

And the p value would be given by:

$p_v =P(z$

Step-by-step explanation:

Information given

n=200 represent the random sample taken

X=12 represent the potatoes with major defects

$\hat p=\frac{12}{200}=0.06$ estimated proportion of potatoes with major defects

$p_o=0.10$ is the value that we want to test

z would represent the statistic

$p_v$ represent the p value

Hypothesis to test

We want to check if the true proportion is less than 0.10 so then the system of hypothesis are:

Null hypothesis: $p\geq 0.1$

Alternative hypothesis: $p < 0.10$

The statistic is given by:

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

Replacing the info given we got:

$z=\frac{0.06-0.10}{\sqrt{\frac{0.10(1-0.10)}{200}}}=-1.89$

And the p value would be given by:

$p_v =P(z$

8 0

4 years ago