Anumber is k units to the left of 0 on the number line. describe the location of its opposite

Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 is he correct? explain why or why not?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?