1 This generally includes replacing a few parts like hoses, sensors, or either the compressor or condenser. 2  CostHelper readers report paying $171-$727 for minor air conditioning repairs, at an average cost of $488. 3  Extensive auto air conditioning repairs can cost $1,000-$4,000 or more, depending on make and model.
Their numerical system is similar to that of the Romans, but instead of Xâs and Iâs they use dots, bars and shells. Each dot has the value of one, each bar the value of five, and each shell the value of zero. This brings us to the main mathematical contribution of the Mayans, the concept of zero.
The Maya set of mathematical symbols allowed even uneducated people to add and subtract for the purposes of trade and commerce. To add two numbers together, for example, the symbols for each number would be set side by side, then collapsed together to make a new single number.