If I have an equation like 6+3y-4 can i move the 3y to the back to deal with the 6 and the -4? ex: 6-4+3y?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

For the inequality |c| < |d| to be true, which of the following must be true?

James is playing his favorite game at the arcade. after playing the game 33 times, he has 88 tokens remaining. he initially had 2020 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays