Please fix this one also. Please.

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

Either you must stop eating my food from the refrigerator or you must pay me for it. 8. what type of conjunction is used in the sentence?

Which sentence best contrasts two things? a. air travel, like bus travel, is a fun way to get from one place to another. b. air travel is a fun and relatively easy way to get from place to place. c. both bus travel and air travel require substantial planning. d. air travel is much more expensive than bus travel.