We are given the following conversion factor:
We are asked to determine how many miles are 140 km. To do that we use the quotient of the conversion factor where the unit we want to convert to is in the numerator and the given unit in the denominator. Since we want to find miles we use the following quotient:
Solving the operations we get:
Answer:
(5x+12) (5x-12)
Step-by-step explanation:
Use the difference of squares fromula. 
Where a = 5x and b =12.
15.5, because 31 divided by 2 is 15.5. And all the other number divided by the number below them also turns out to be 15.5.
Hope this helps. :)
Answer: Push factors encourage people to leave their points of origin and settle elsewhere, while pull factors attract migrants to new areas. For example, high unemployment is a common push factor, while an abundance of jobs is an effective pull factor.
Step-by-step explanation:
I think it is true. But Please don't take my word on it.
