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iren [92.7K]
3 years ago
9

1.Which property justifies the statement if y=7 then 7=y?

Mathematics
1 answer:
neonofarm [45]3 years ago
6 0

Answer:

1. option C, i.e., symmetric property.

2. option B, i.e., Integer

3. option D, i.e., zero product property

Step-by-step explanation:

Symmetric property: According to this property it a=b the b=a.

By symmetric property, we can say that, if y=7 then 7=y.

Therefore, the correct option is C, i.e., symmetric property.

Closure property: According to this property, if a∈S and b∈S, then a*b∈S.

Subtraction of natural numbers is not always natural.

1\in N,2\in 2, 1-2=-1\notin N

Subtraction of integers is always integer.

Subtraction of irrational number is not always irrational number.

\sqrt 2\in Q, \sqrt 2-\sqrt 2=0\notin Q

Subtraction of odd number is always even.

Therefore, the correct option is B, i.e., Integer.

Given statement is (a-b)*0=0.

According to zero product property if ab=0, then a=0 or b=0.

So, the given statement is true by zero product property.

Therefore, the correct option is D, i.e., zero product property.

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This question is incomplete, the complete question is;

Suppose John is a high school statistics teacher who believes that watching many hours of TV leads to lower test scores. Immediately after giving the most recent test, he surveyed each of the 24 students in his class and asked them how many hours of TV they watched that week. He then matched each student's test grade with his or her survey response. After compiling the data, he used hours of TV watched to predict each student's test score. He found the least-squares regression line to be y"  = -1.5x + 85.

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Answer:

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Step-by-step explanation:  

Given the data in the question;

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Step-by-step explanation:

<u>Here are the Options verified:</u>

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Read 2 more answers
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Answer:

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Step-by-step explanation:

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