Let represent the total cost of publishing a book (in dollars). let represent the number of copies of the book printed. suppose that and are related by the equation . answer the questions below. note that a change can be an increase or a decrease. for an increase, use a positive number. for a decrease, use a negative number. what is the change in the total cost for each book printed? what is the cost to get started (before any books are printed)?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"