Why do you subtract to find the sum of a positive and a negative integer

Question not on textbook: An insurance company has 25,000 automobile policy holders. If the yearly claim of a policy holder is a random variable with mean 320 and standard deviation 540, use CLT to approximate the probability that the total yearly

Which table shows equivalent measurements

Brian has reduced his cholesterol level by 14% after his last check up. If his original level was 280, what is his approximate cholesterol level now?

Simplify (2n + 5) - (3n + 7) + (4n - 9).

Eva wanted to fill bags with 3/4 pounds of trail mix. she started with 11 3/8 pounds but ate 1/8 pound before she started filling the bags. How many bags could she fill

Find the slope for the following line:y=3/4*-7

My last question had something wrong with the typing, so im remaking the post Samuel has a collection of toy cars. His favorites are the 27 red ones which make up 60%, percent of his collection. How many toy cars does Samuel have?

Find the solution set x^2-7x-8=0 separate the two values with a comma

The bookshelf was bought at a wholesale price of $147.00, and Gabriela Furniture Store Marie up all Furniture by 60%. At what price should the manager sell the bookshelf?

Which of the following is a statistical question? A. What is the average of all your scores this semester? B. What was your score on the last exam?