Give examples of problem or situations in real life that involve the use of rational equation,inequality and function

To begin with, a reminder of what a function is: f is a function of x if for every x in the domain of definition of f there exists y in the range of f such that y = f(x). Now this may sound very theoretical and it is as a matter of fact, however this is one example of many of a function in real life.

To begin with, a reminder of what a function is: f is a function of x if for every x in the domain of definition of f there exists y in the range of f such that y = f(x). Now this may sound very theoretical and it is as a matter of fact, however this is one example of many of a function in real life.Suppose it is summer and you are sunbathing on the beach and you want to buy some cold and refreshing drink. You look around and you see a soda vending machine. You go over there and you put a coin in the machine and out comes a soda can. The coin here is the input or x and the soda can is the output or y and the soda vending machine has as a function delivering something to you, and for each input you get exactly one output either a soda or a chocolate bar. In other words for each x, you get a y.

To begin with, a reminder of what a function is: f is a function of x if for every x in the domain of definition of f there exists y in the range of f such that y = f(x). Now this may sound very theoretical and it is as a matter of fact, however this is one example of many of a function in real life.Suppose it is summer and you are sunbathing on the beach and you want to buy some cold and refreshing drink. You look around and you see a soda vending machine. You go over there and you put a coin in the machine and out comes a soda can. The coin here is the input or x and the soda can is the output or y and the soda vending machine has as a function delivering something to you, and for each input you get exactly one output either a soda or a chocolate bar. In other words for each x, you get a y.It is still summer and you have been wanting to paint your room for quite a while and now you have the chance. So you start painting and it turns out that it may take you 4 hours alone and suddenly you remember that your pal did paint her room for not so long ago and it took her 2 hours to do it, so you rush to the phone and call her and ask for help. Together you can complete the task a lot faster and you get the equation x / 4 + x / 2 = 1, which gives 3x / 4 = 1 and x = 4 / 3 = 1 1 /3. So after 1 hour and 20 minutes you were done painting the room.

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Answer:

What are some examples of problems or situations in real life that involve the use of rational equation, inequality, and function?

To begin with, a reminder of what a function is: f is a function of x if for every x in the domain of definition of f there exists y in the range of f such that y = f(x). Now this may sound very theoretical and it is as a matter of fact, however this is one example of many of a function in real life.

Suppose it is summer and you are sunbathing on the beach and you want to buy some cold and refreshing drink. You look around and you see a soda vending machine. You go over there and you put a coin in the machine and out comes a soda can. The coin here is the input or x and the soda can is the output or y and the soda vending machine has as a function delivering something to you, and for each input you get exactly one output either a soda or a chocolate bar. In other words for each x, you get a y.

It is still summer and you have been wanting to paint your room for quite a while and now you have the chance. So you start painting and it turns out that it may take you 4 hours alone and suddenly you remember that your pal did paint her room for not so long ago and it took her 2 hours to do it, so you rush to the phone and call her and ask for help. Together you can complete the task a lot faster and you get the equation x / 4 + x / 2 = 1, which gives 3x / 4 = 1 and x = 4 / 3 = 1 1 /3. So after 1 hour and 20 minutes you were done painting the room.