What is the solution to the system of equations below? y=2/5x-3 and x = –10
1. (–10, –7)
2. (–10, –1)
3. (–7, –10)
4. (–1, –10)

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?