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7nadin3 [17]
3 years ago
12

Please Please Please help! 

Mathematics
1 answer:
lara [203]3 years ago
4 0
Take the first equation and set it to equal x by subtracting 5y from both sides and multiplying by -1.  Looks like this...

-x + 5y = 1
     -5y      -5y
-x = -5y + 1
-1(-x = -5y + 1)
x = 5y - 1   ... substitute this into the second equation you get.....

2(5y - 1) + 4y = -4   answer is #2
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What is the measurement of BC to the nearest centimeter?
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Answer:

a   8

Step-by-step explanation:

You are given two sides and the included angle. Since you don't have any side and the opposite angle, you must use the law of cosines.

a^2 = b^2 + c^2 - 2bc\cos A

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Natasha_Volkova [10]

Answer:

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Step-by-step explanation:

The marginal cost is the additional cost of producing one more unit of output and it can be calculated by taking the change in total cost and dividing it by the change in quantity, its formula is:

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The average total cost (sometimes referred to simply as average cost) is total cost divided by the quantity of output, its formula is:

  • <u><em>Average total cost = total cost / quantity of output</em></u>

The total cost is obtained adding together the fixed costs and the variable costs, its formula is:

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The average variable cost is obtained when variable cost is divided by quantity of output, its formula is:

  • <em>Average variable = variable cost / quantity of output</em>

I hope you find this information useful and interesting! Good luck!

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Step-by-step explanation:

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