Which expressions are equivalent to 4a-84a−8. Select all that apply. 1.) −8+4a
2.) 8-4a8−4a
3.) 4a+-84a+−8
4.) 2(2a-4)2(2a−4)
5.) 4(a-8)4(a−8)

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