Answer :

KitKat69
7: since they went down further you go further from zero: -28-40=-68 or D.
8: they lost 6 and then 8 so 6+8=14 but they lost them so -14 or A :)
AmberlinaC
7. is D. -68 feet because the submarine is already at -28 ft, subtract another 40 ft and you get -68 ft
8. is A. -14 yards because they lost 6 yards (-6 yds) then lost another 8 yards (-8 tds) so subtract 8 from -6 to get -14 yards

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