Doi cocosi cantaresc tot atat cat 3 gaini. Opt cocosi si 9 gaini cantaresc 42 kg. Cat cantareste un cocos si cat cantareste o ga
ine , stiind ca toti cocosii au aceeasi greutate , respectivtoate gainile cantaresc la fel. METODA ARITMETICA
1 answer:
Answer:
The weight of one rooster is 3 Kg and the weight of one hen is 2 Kg
Step-by-step explanation:
<u><em>The question in English is</em></u>
Two roosters weigh as much as 3 chickens. Eight roosters and 9 hens weigh 42 kg. How much does a rooster weigh and how much does a hen weigh, knowing that all roosters have the same weight, respectively the hens weigh the same.
Let
x ----> the weight of one rooster in kilograms
y ----> the weight of one hen in kilograms
we know that
------> equation A
----> equation B
Solve the system by graphing
Remember that
The solution of the system of equations is the intersection point both graphs
The solution is the point (3,2)
see the attached figure
therefore
The weight of one rooster is 3 Kg and the weight of one hen is 2 Kg
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Interval notation is written using brackets or parentheses. Brackets mean that the value of the corresponding side is equal to the function. Parentheses are the opposite of brackets in this case, and it is not part of the equation.
I will post the graph of this equation below.
Therefore, the domain of this equation in interval notation is (-∞, 6/7).
Note that it is parentheses not brackets. The graph does not go past 6/7, and infinity is not a number, it is a concept.
