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:
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:
