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OlgaM077 [116]
3 years ago
13

Please answer the following

Mathematics
1 answer:
nikitadnepr [17]3 years ago
3 0
The first part of the answer is 20x+9
Second part is 4a-6b
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Ad libitum [116K]

Answer:

D. A\subset \mathbb{R}\times\mathbb{R}.

Step-by-step explanation:

Consider the set

A=\left\{(2,3),\ (5,1),\ (-3,-2),\ (0,3)\right\}

This set consists of four ordered pairs.

The first numbers in these pairs are 2,\ 5,\ -3,\ 0. These numbers are integer numbers (not natural, because -3 is negative).

The second numbers in these pairs are 3,\ 1,\ -2,\ 3. These numbers are integer numbers too (not natural, because -2 is negative).

Options contain only natural and real sets, so, the first and the second numbers are real numbers and

A\subset \mathbb{R}\times\mathbb{R}.

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