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Damm [24]
3 years ago
13

What is -13/6(12/7)=

Mathematics
2 answers:
kolezko [41]3 years ago
6 0

Answer:

-3.74

Step-by-step explanation:

Use PEMDAS

do the parenthesis first 12 divided by 7

-13 / 6 (1.7)

divide -13 by 6

-2.2(1.7)

multiply those two numbers

-3.74 is the answer

-BARSIC- [3]3 years ago
5 0

Answer:

-267

Step-by-step explanation:

−136(127)

=(−136)(127)

=(−13)(12)(6)(7)

=−15642

= −267

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ch4aika [34]

Answer:

1. 2(x+3)

2.x-3

3.2(x-3)

4.2-3x

5.x2+3

6.3-2

7.3+2

8.3x-2

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Step-by-step explanation:

5 0
2 years ago
Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the hospital. Do patients at ru
valina [46]
  1. For this study, we should use t-test and the null and alternative hypotheses would be given by H₀: μ = 7 and H₁: μ < 7.
  2. The test statistic is -1.941 and the p-value (0.0381) is <u>greater than</u> α = 0.01.
  3. Based on this, we should <u>fail to reject</u> the null hypothesis.
  4. Thus, the final conclusion is that the data suggest the population mean is not significantly lower than 7 at α = 0.01, so there is statistically insignificant evidence to conclude that the population mean waiting time to be admitted into the hospital from the emergency room for patients at rural hospitals is equal to 7 hours.

<h3>What is a null hypothesis?</h3>

A null hypothesis (H₀) can be defined the opposite of an alternate hypothesis (H₁) and it asserts that two (2) possibilities are the same.

<h3>How to calculate value of the test statistic?</h3>

The test statistics can be calculated by using this formula:

t=\frac{x\;-\;u}{\frac{\delta}{\sqrt{n} } }

<u>Where:</u>

  • x is the sample mean.
  • u is the mean.
  • is the standard deviation.
  • n is the number of hours.

For this study, we should use t-test and the null and alternative hypotheses would be given by:

H₀: μ = 7

H₁: μ < 7

t=\frac{6.3\;-\;7}{\frac{1.3}{\sqrt{13} } }\\\\t=\frac{-0.7}{\frac{1.3}{3.6056 } }

t = -0.7/0.3606

t = -1.941.

For the p-value, we have:

P-value = P(t < -1.9412)

P-value = 0.0381.

Therefore, the p-value (0.0381) is <u>greater than</u> α = 0.01. Based on this, we should <u>fail to reject</u> the null hypothesis.

Thus, the final conclusion is that the data suggest the population mean is not significantly lower than 7 at α = 0.01, so there is statistically insignificant evidence to conclude that the population mean waiting time to be admitted into the hospital from the emergency room for patients at rural hospitals is equal to 7 hours.

Read more on null hypothesis here: brainly.com/question/14913351

#SPJ1

4 0
2 years ago
Help me please,Thanks
Monica [59]
If you did the math it is obvious that the answer is 20%
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3 years ago
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Jane has saved 600 dollars in a college fund. She added money to the account over the next year and at the end of the year the a
lianna [129]

Answer:

$290.00

Step-by-step explanation:

The equation would be 890-600=290 because if you subtract the base amount from the final savings it would give you how much she saved altogether.  

Hope this helps! :)

5 0
3 years ago
Solve 5/4 - 1/3 - 1/2 subtraction subtracting fractions ​
Lerok [7]

Answer:

5/4 - 1/3 - 1/2=/2/0

Step-by-step explanation:

5 0
3 years ago
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