Answer:
sequence
Explanation:
They started talking about how 40 years ago China was a feeble giant then it proceeded to talk about how in 1978 the government becang making reforms. It then spoke of what happened in 2011. This is a sequence of events that happened over decades of time.
The answer would be 4y-2
You cannot combine -2 and 4y because they are not like terms.
Hope this helps :)
