Answer:
10:30 A.M
Step-by-step explanation:
This comes from subtracting 4 from both sides.
Using a system of equations, it is found that:
- There are 8 chickens in the yard.
- There are 16 pigs in the yard.
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This question is solved using a system of equations. I am going to say that:
- x is the number of chickens.
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- A chicken has 1 head, as do a pig.
- There are 24 heads.
Thus:

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- A chicken has 2 feet.
- A pig has 4 feet.
- In total, there are 80 feet.
Thus:

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Number of chicken:
Since 






There are 8 chickens in the yard.
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Number of pigs:

There are 16 pigs in the yard.
A similar problem is given at brainly.com/question/24104709
Technically this is not necessarily true for all. A function has each input mapped to one output, therefore there can be two inputs that have the same output. However, when inverted, the input will have two outputs, which is not a function. For example with (1,3) (2,3) (3,4) (4,5) this is a function but switched (3,1) (3,2) ! Two inputs have the same output, which is not a function!