X would equal -9
Because -9 times -2 equals 18
Answer:
The country's population decreased about 5.8 % during this time period.
Step-by-step explanation:
Population in 1990 = 164 million
Population in 2010 = 155 million
Determine the percent decrease
The formula used is: 
We have :
Initial Value = 164 million (164,000,000)
New Value = 155 million (155,000,000)
Finding percent decrease

So, The country's population decreased about 5.8 % during this time period.
Step-by-step explanation:
Watch all steps in picture
I believe that the correct newer would actually be the last option. By this Eddie person finding the length of the cube, the small cube, as also the cube which is the bigger one, if we were just to find the length and just add them all up, we would then find how many would then fit.