Finish the proof of propositioll 1.u. a let a and b be sets. the symmetric difference of a and b is (aub) (anb). show that (aub) (anb) = (a | bu( ba)

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

Plz hurry evaluate the expression a+b where a=8 and b=19

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)