In german how do you decide between accusative and you

The nominative case is used for the subject of the sentence. The accusative case is used for the direct object in a sentence. For example,

"Der Schriftsteller schreibt einen neuen Roman."

The subject of the sentence is Schriftsteller; this noun is used, therefore, in the nominative case. "What is the author writing? - A new novel." The noun Roman is the direct object; that's why it is used in the accusative case.  

Another example:

"Der Mann liest den Brief."

Der Mann is the subject (nominative); den Brief is the direct object (accusative).    

answer:

how is it a scam if we ask each other for ? you ask the question and you get answers its that simple. don't forget that this does not use money just to get this also on phone

answer:

seven. five plus one is six. five + 1+1 is 7. 1+1 equals two. so just add 2 to five. seven.