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2 years ago

Please help me with 20 through 22 please I really appreciate it! Thank you very much!

Mathematics

1 answer:

Ivahew [28]2 years ago

6 0

Answer:

20. 2x+y

21. 4

22. x+y

Step-by-step explanation:

20. 9x+2y - x-2y find your LCM

4 4

=(9x+2y)-(x-2y) clear bracket

4

=9x+2y-x+2y collect terms

=9x-x+2y+2y

4

=8x+4y factorize

4

=4(2x+y)

4

=2x+y

with this, you will understand the following

21. 4x + 8y

x+2y x+2y

=4x+8y

x+2y

=4(x+2y)

x+2y

22. 2x-y + 2x+5y

4 4

=2x-y+2x+5y

=4x+4y

=4(x+y)

=x+y

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3 years ago

Tell whether the relation is a function. {(-5, -3), (-1, 3), (4, 3), (8, 8)}

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The relation is {(-5, -3), (-1, 3), (4,3), (8, 8)}.

To find:

Whether the given relation is a function or not.

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We have, a relation given as

{(-5, -3), (-1, 3), (4,3), (8, 8)}

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Thus, there exist a unique output for each input.

Therefore, the given relation is a function.

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