Question

Simplify the expression that you wrote in part D, and explain what the number means with regard to the problem.

Answer 1

Answer:

When two negatives are put together, it makes a positive. Something subtracted by a negative number, will then have that negative number added to it.

Step-by-step explanation:  hope it helps! i know its late but other people can use the answer. <3

Answer 2

Answer:

12.3 + 9.6 = 21.9

The number 21.9 means Vivian's elevation increased by 21.9 feet as she rode the Ferris wheel from the bottom to the top.

Step-by-step explanation: