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Svetradugi [14.3K]
3 years ago
8

Solve each system by substitution

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
4 0

Step-by-step explanation:

{9x+3y=-36

y=-3x-21

9x-9x-36=-36

y=-3x-21

x=0

y=-21

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Step-by-step explanation:

the total cost is, of course, first the cost to buy the copier, and then the running costs per copy made.

it is really that easy.

the equations just put this into mathematical form :

A

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B

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please notice, we put $600 or $800 in as constant term, because these costs are the starting costs that we have, even if we never make a single copy (x = 0).

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2 years ago
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Lyrx [107]

Answer:

Step-by-step explanation:

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7 0
3 years ago
Please can someone explain how to work out this
wariber [46]

Answer:

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