Can someone help me evaluate this expression pls

If square root x = -7, then x= -49 true or false

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?