Lose 2 oz of water in 1st minute....and loses 2 oz of water in 2nd minute. this is false because this will not equal 0.....it will equal -4 oz...because it is losing a total of 4 oz in 2 minutes....FALSE
the diver descends to the shipwreck.....and then returns to the surface....this one is true. Lets say the shipwreck is 20 ft below the surface....so he descends 20 ft.....thats -20....but then he ascends (comes back up) 20 ft......and -20 + 20 = 0....TRUE
Well suppose you find out that numbers you put in your equation and you solved the equation correctly produces the negative number on your bank account it means nothing except - on your bank account.