O (x 4 7)2 + (+ 10)2 = 25; center (7, 10), r = 5 Question 16 (5 points) Use a_ 450 to write 2x + 2xy+ 5y + 6x - 4y = 40 in the x'y'-plane. Then identify the conic. ( 172 ~/3) (x')2 +(-46 ~/3)x'y'+(+ 11-2~/3)()2+(12~/2 -8~/3)x'+(-8~/2-12~3)y'-16 213)(32+(12/ 2-8~/3)x'+(-8~/2-12~3)y'-1