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Licemer1 [7]
3 years ago
5

THIS IS 1 QUESTION YEAR 9 MATHS PLEASE HELP ME

Mathematics
2 answers:
Katyanochek1 [597]3 years ago
5 0
I think it’s B and D
natka813 [3]3 years ago
5 0
The two shapes with rotational symmetry are B and D
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A camp leader figures that she needs one tent for every three campers, plus a tent for herself. Define a variable and write an e
Tomtit [17]
3t+1
The t stands for tent, and is being multiplied by 3 because there is always going to be 1 tent for every 3 campers. Plus one, for the camp leader. 

6 0
3 years ago
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Gianna earned $466.90 at her job when she worked for 23 hours. How much money did she earn each hour?
Galina-37 [17]

Answer:

About $20.30

Step-by-step explanation:

$466.90 divided by 23.

5 0
3 years ago
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In a certain manufacturing process, it is known that, on average, 1 in every 100 items is defective.
Rashid [163]

Answer:

A. 0.009899

B. 0.005624

Step-by-step explanation:

Data:

Let the probability that an item is defective = \frac{1}{100}

The probability that the item is not defective = \frac{99}{100}

The probability that the fifth item is defective = \frac{1}{100}* \frac{98}{99}

                                                                            = 0.009899

Probability that one in 5 items is defective  = 0.005624

5 0
3 years ago
63 is 63% of what number​
san4es73 [151]
63 is only 63% of the number 100.
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3 years ago
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g If a hypothesis test with a significance level of α rejects H0: μ1=μ2 in favor of Ha: μ1≠μ2, then thecorresponding (1- α)% con
Effectus [21]

Answer:

The statement, (1- <em>α</em>)% confidence interval for (μ₁ - μ₂) does not contain zero is TRUE.

Step-by-step explanation:

The hypothesis for a test is defined as follows:

<em>H</em>₀: μ₁ = μ₂ vs. <em>H</em>ₐ: μ₁ ≠ μ₂

It is provided that the test was rejected st the significance level <em>α</em>%.

If a decision is to made using the confidence interval the conditions are:

If the null hypothesis value is not included in the (1 - <em>α</em>)% confidence interval then the null hypothesis will be rejected and vice versa.

In this case the null hypothesis value is:

<em>H</em>₀: μ₁ - μ₂ = 0.

If the value 0 is not included in the (1 - <em>α</em>)% confidence interval for the difference between two means, then the null hypothesis will be rejected.

Thus the statement, (1- <em>α</em>)% confidence interval for (μ1- μ2) does not contain zero is TRUE.

5 0
3 years ago
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