R+(2r+4)=(r+2r)+4=3r+4

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?