How just how do you do this?

Mathematics

1 answer:

vlabodo [156]3 years ago

5 0

You need to get y alone for both equations. for x-y=7, you subract x from both sides. (giving you -y = 7 - x) then, multiply the whole equation by -1 to make the y positive, which gives you y = x - 7.
here is the system in y intercept form so you can graph it easier:
*y = x - 7
*y = x + 4

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vazorg [7]

<h3>Answer is -8</h3>

Work Shown:

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Whole numbers are _____ integers. . . . .A. always. B. sometimes. C. never

guapka [62]

Whole numbers are sometimes integers.

$\boxed{ \ The \ Answer \ is \ B \ }$

<h3>Further explanation</h3>

The set of natural numbers (also called the set of counting numbers) is denoted by N: $\boxed{ \ N = \{1, 2, 3, ...\} \ }.$
Natural numbers together with zero called are called whole numbers. The set of whole numbers is denoted by W: $\boxed{ \ W = \{0, 1, 2, 3, ... \} \ }.$
The set of natural numbers are not enough for all the number problems in everyday life. For example, natural numbers cannot be used to write some winter temperatures, since such temperatures may be less than zero i.e., negative numbers.
The set of integers are the union of the set of negative numbers with the set of natural numbers and zero. The set of integers is denoted by Z: $\boxed{ \ Z = \{..., -3, -2, -1, 0, 1, 2, 3, ... \} \ }.$
The set of negative integers is denoted by Z⁻: $\boxed{ \ Z^- = \{ ..., -3, -2, -1 \} \ }.$
The set of positive integers is denoted by Z⁺: $\boxed{ \ Z^+ = \{1, 2, 3, ... \} \ }.$
The set of non-negative integers are the set of all positive integers together with zero.
The set of non-positive integers are the set of all negative integers together with zero.

Conclusion:

Whole numbers are sometimes integers because negative integers are not part of whole numbers. In other words, whole numbers are not fully integers.

----------------------------------

Examples of integers around us:

The height of an airplane flight typically between 31,000 and 38,000 feet.
Ice melts at 0⁰C.
This diver is swimming at -20 m.

<h3>Learn more</h3>

9 ten thousand divided by 10 in unit form brainly.com/question/4786449
What represents the simplified form of an expression: 5(14 - 2)² ÷ 2 brainly.com/question/1602237
Explanations and an example of a question about the four types of number form brainly.com/question/4725342

Keywords: whole numbers are sometimes integers, always, never, natural, counting, zero, negative integers, positive, the set