P=21+2w; if p=18 when l=5, find w

Rename mixed numbers before you can subtract are what

Solutions for 2x+7 less than or equal to 3x-5

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?