U=x²+xy+y²+1/x +1/y Check the following function for extremum(Math analysis).

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?