It depends on what country you're referring to. A lot of countries use pesos as their currency and each one has a different value versus the US dollar.
In any case exchange rates change every day so any specific answer posted here would be out of date almost immediately. While it's not normal WikiAnswers policy to say "use the internet", that's the best approach in this case. You can check a site such as www.xe.com, CNNMoney, etc. for the latest conversion factors.
20 pesos
1 US Dollar = 3.7 Argentina Peso leys and Pesos.
1 Dollar today is 13.07 Mexican Peso.
1 US dollar is equal to 43.46 Philippine pesos today.
Right now 1 peso would be abouut 0.07 US on the average 0.05 US..
1 Mexican Peso = 0.048 US Dollar
20 pesos
1 US Dollar = 3.7 Argentina Peso leys and Pesos.
1 Dollar today is 13.07 Mexican Peso.
$1 = 42.76 philippine peso
The rate changes but at this time you need 570 coins of 1 peso to have 1 US dollar
2062
in a Mexican peso on January 10 of 2010, 1 USD is 12.765 MXNP (Mexican Peso)
It changes daily. As at 4-Feb, 1 Mexican Peso is worth $0.08. 1 US Dollar is worth 13 Pesos.
1 US dollar is equal to 43.46 Philippine pesos today.
As of Dec 3 2011, 1 US Dollar = 13.53 Mexican Pesos. So, yes a US dollar is worth more than a Mexican Peso
1 US dollar is around 20 Uruguayan Pesos.