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2 years ago

Ryan, Sasha, Connie, and Lawrence completed the following proof. Who completed the proof incorrectly?

Mathematics

2 answers:

Sedbober [7]2 years ago

6 0

Sasha was incorrect because she divided but said she had subtracted

marissa [1.9K]2 years ago

5 0

<h2>Answer:</h2>

The person who completed the proof incorrectly is:

Option: B

B) Sasha

<h2>Answer with explanation:</h2>

Sasha was incorrect with her proof.

She followed as follows:

3x+7=5x-11 Given

7=2x-11

( She subtracted 3x from both the sides of the equation)

Hence, the property is subtraction property of equality.

18=2x

She added 11 on both the sides of the equation.

Hence, the property is addition property of equality.

<em>she divided both side of the equation by 2.</em>

<em>Hence, the property is division property of equality but she called it as a subtraction property of equality.</em>

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Answer:

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Step-by-step explanation:

a+5/3 (Note: this means a+5 over 3, as in a fraction.)

3 x 8 = a + 5

24 = a + 5

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19 = (a + 5) - 5

19 = a + 5 - 5

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2 years ago

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Step-by-step explanation:

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A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given th

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Answer:

The margin of error for the 95% confidence interval for the mean score of all such subjects is of 8.45.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

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Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2.0518

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In which s is the standard deviation of the sample and n is the size of the sample.

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