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Evgen [1.6K]
4 years ago
11

HELP PLEZZZZZZZZZZZZZZ BRAINLIEST AND 30 POINTS to THE CORRECT ANSWER

Mathematics
1 answer:
Andrei [34K]4 years ago
8 0

It is B.

The rule of the larger one is(4x, 4y).

So the small one is divide by 2

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A farmer owns pigs, chickens, and ducks. When all her animals are together, she has 30 feathered animals, and the animals all to
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To solve this problem, let us first assign some variables. Let us say that:

x = pigs

y = chickens

z = ducks

 

From the problem statement, we can formulate the following equations:

1. y + z = 30                                         ---> only chicken and ducks have feathers

2. 4 x + 2 y + 2 z = 120                      ---> pig has 4 feet, while chicken and duck has 2 each

3. 2 x + 2 y + 2 z = 90                        ---> each animal has 2 eyes only

 

Rewriting equation 1 in terms of y:

y = 30 – z

Plugging this in equation 2:

4 x + 2 (30 – z) + 2 z = 120

4 x + 60 – 2z + 2z = 120

4 x = 120 – 60

4 x = 60

x = 15

 

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Step-by-step explanation:

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