Your question is a bit oddly-phrased; "Estados Unidos Mexicanos" is the official name of Mexico so you're asking what the value of Mexico is :)
Now, if you're actually asking the value of Mexican money in the US, you need to know the current exchange rate between pesos and dollars. Exchange rates change every day so any answer posted here would be out of date almost immediately. While it's not normal Answers.com policy to say "use the internet", that's the best approach in this case. You can check a site such as xe.com, CNNMoney, etc. for the latest conversion factors.
50cents
Id say 15.00$
0 dollars just throw it away
8 - 15 dollars
These are fairly valuable coins. A well worn coin is valued at $10. A coin in average condition is valued at $25. A well preserved coin in valued at $100. A fully uncirculated coin is valued at $500.
It is a gold coin named Centenario, worth USD$1,244.
Estados Unidos tiene 100 senadores en total, dos por cada uno de los 50 estados.
The gold coin you are talking about is a "Centenario" and it is worth about $1,200 dollars (or 785 Euros).
los estados unidos tiene 100 senadores
El "1984 Estados Unidos Mexicanos 100" se refiere a la Constitución Política de los Estados Unidos Mexicanos, promulgada en 1917, que ha tenido reformas a lo largo de los años, incluyendo en 1984. Este documento establece los principios fundamentales del sistema legal y político de México, garantizando derechos y libertades a los ciudadanos. La referencia a "100" puede aludir a un aspecto específico o un contexto dentro de la historia constitucional del país.
These coins are worth a price ranging close to $10 each. The amount of money that you can expect from the coins will vary depending upon their condition.
It is .100 fine silver, it's nick name in Spanish, Feo means ugly do to it's low content and the fact they turn a ugly (rusty) gray and black.