What do you do with the minus in front of a number during order of operations?

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

Ineed me i stuck and i don’t want to get it wrong

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?