Which situation models combining a number and its additive inverse to make 0? a. after spending $20.00, marjorie has $20.00 left in her wallet. b. the temperature at midnight was –8°f. the temperature decreased 8°f by morning. c. tim has $25.00 in his bank account. he withdraws $25.00 from his bank account and gives it to his mother. d. an airplane is at an altitude of 50,000 feet. an hour later, the airplane is still at an altitude of 50,000 feet.

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.