Jim is now z years old a) his brother is 4 years older than jim. find his brothers age in terms z b) his sister is 3 years younger then jim find his sisters age in terms z

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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