1) Which of these situations can be represented by the opposite of 80? Select all that apply. * a) An airplane descends 80m.
b) An elevator ascends 80m.
c) The cost of a train ticket drops $80.
d) You remove 80 songs from an iPhone.
e) Suzy's grandmother is 80 years old.

D because if you remove the song there will be no more numberrs which is the opposite.

step-by-step explanation:

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4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80