If the temperature is at 6 and it rises to 22 what is the temperture

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

The tile along the edge of a triangular community pool needs to be replaced? ?

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)