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Natasha2012 [34]
3 years ago
11

Cows and Chickens

Mathematics
1 answer:
Lesechka [4]3 years ago
4 0

Answer:

27 Chickens

Step-by-step explanation:

<em>Represent the chicken with A and the cows with B</em>

Given

A + B = 30

A has 2 legs and B has 4; So:

2A + 4B = 66

Required

Determine A and B

Make B the subject of formula in the first equation

B = 30 - A

Substitute 30 - A for B in the second equation

2A + 4(30 - A) = 66

Open the bracket

2A + 120 - 4A = 66

Collect Like Terms

2A - 4A = 66 - 120

-2A= -54

Divide through by -2

A = 27

<em>Hence, the farmer has 27 chickens</em>

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I need help no ilnks please and thank you also please explain how you got the answer
oksian1 [2.3K]

You want to leave a 15% tip on a meal that cost $65.00.

First, convert the 15% to an actual number that can be used in a calculation. For percents,this is always done by simply dividing the percent (in this case 15%) by 100%.So, the conversational term "15%" becomes 15% / 100% = 0.15 in terms of a real mathematical number.

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HOPE THIS HELPS!!!

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