Difference between the availability heuristic and the representativeness heuristic.

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?