Haruto gave 42 of his paycheck to his mother. If his paycheck was 855 how much money did he give to his mother

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

Pls! does anybody know a shortcut for answering these types of questions in the future?