How many more copies of the cats meow would the bookstore sell in one year than mays lamb

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

Which expressions are equivalent to -6 + 3m

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?