Dani lays a notebook flat on a table and opens it How many degrees did Dani rotate the notebook cover?

180 degrees

Step-by-step explanation:

Sorry if this is wrong- Reason I put 180 is because he opened the book, but its on a table so that would be 180. Although it he trying to read it while standing up, the book would just be in  360 degree angle

Hope this helps!

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.