If a = 2 + i, and b = 3 – 2i, what is a/b?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?