What can be Used to heat homes in generate power plants but it can also contaminate groundwater during the Mining-process

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)

Which statement about portugal is not true? a. it granted independence to its last colony in 1975 b. it has avoided conflict with spain c. it was a leader in european world exploration in the 1400s d. its economy is changing from agricultural to industrial b. it has avoided conflict with spain

When you start from a given set of rules and conditions and determine what must be true you are using blank reasoning