It's about equation systems with two incognitos. "In a farm exists chickens and lambs. There are 31 animals in total and 82 legs. how many chickens and lambs are there?

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

What is the value of x? enter your answer in the box. (cm)

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?