Nitrogen makes up how much of Earth’s atmosphere? 100% 78% 22% 0%

Can someone me do math because i am having a breakdown rn because i don’t get it

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?

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