Apuzzle expert wrote a new sudoku puzzle book. his initial costs are $864. binding and packaging each book costs $.80. the price of the book is $2. how many copies must be sold to break even.

The puzzle expert must sell 720 copies to break even.

Step-by-step explanation:

Hi, to solve this problem you have to write two equations analyzing the information given.

initial cost = $864

cost per book = $0.80

price of each book = $2

So, mathematically speaking:

864 + x 0.80 = y

2x = y

Substituting the 2nd equation into the first:

864 + x0.80 = 2x

864= 2x- 0.80x

864 = 1.2x

864/1.2=x

x= 720

In conclusion, the puzzle expert must sell 720 copies to break even.

Feel free to ask for more if it´s necessary or if you did not understand something.

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: