3 years ago

Calculate the perimeter of a triangle with the following measurements: 200 mm, 40 cm and 400 dm Please HELP

Mathematics

1 answer:

melisa1 [442]3 years ago

5 0

Answer:

640 dm

Step-by-step explanation:

200+40+400=640dm

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We can solve this by substitution method.

Look at the second equation. If we rearrange to find 7x, we can substitute in the value into the first equation.

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$7y-12=-5$

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$x=-1$

__________________________________________________________

Answer:

$y=1\\x=-1$

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