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goldenfox [79]
3 years ago
5

What is 18÷9-3+5+6-6+6-5

Mathematics
2 answers:
nikklg [1K]3 years ago
6 0
Answer is just 11

You're welcome !
CaHeK987 [17]3 years ago
4 0
It is 11 because 1 18÷9 = 2 2+3 = 5 5+5 = 10 10+6 = 16-6=10 10+6=16 16-5 equal 11
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What inequality is shown
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Answer:

Y ≤ X + 6

Step-by-step explanation:

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What is the quotient when the sum of 1,2 and 3 is divided by the product of 1,2 and 3
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Answer: 1

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sum = add

quotient = divide

product = multiply

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Suppose the standard deviation of a normal population is known to be 3, and H0 asserts that the mean is equal to 12. A random sa
blagie [28]

Answer:

z=\frac{12.95-12}{\frac{3}{\sqrt{36}}}=1.9  

p_v =P(z>1.9)=0.0287  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 12 at 5% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=12.95 represent the sample mean

\sigma=3 represent the population standard deviation for the sample  

n=36 sample size  

\mu_o =12 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is equal to 12, the system of hypothesis would be:  

Null hypothesis:\mu \leq 12  

Alternative hypothesis:\mu > 12  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic  

We can replace in formula (1) the info given like this:  

z=\frac{12.95-12}{\frac{3}{\sqrt{36}}}=1.9  

P-value  

Since is a right tailed test the p value would be:  

p_v =P(z>1.9)=0.0287  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 12 at 5% of signficance.  

4 0
3 years ago
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Mary bought a handbag for 15.00naira. if she sold it for 18.00,what was her percentage gain?​
melomori [17]

Answer:

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Step-by-step explanation:

profit = SP - CP = 18 - 15 = 3 naira

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hence her total percentage gain was 20%

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7<br> Tuesday<br> Find the Greatest Common<br> Factor of 16 and 28:
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Answer:

The answer is 4.

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2. find the highest factor of the two Factored #.(4)

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