Sean has a bag containing x green marbles and two bags containing y blue marbles. he adds 15 marbles to the bag of green marbles and adds 6 marbles to each bag of blue marbles. the total number of marbles in all three bags is given by the expression (x + 15) + 2(y + 6). identify an equivalent expression.

After reading 80% of her e-mails in her inbox, danette still has m unread e-mails. which of the following expressions could represent the number of e-mails danette had in her inbox before she started reading? choose 2 answers: (choice a) 5m (choice b) 1.8m (choice c) 80m (choice d) m/0.8 (choice e) m/1−0.8