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thank you very much.(x - 5)2 + (y+9)2 + (z+4)2 = 81 is a sphere that is tangent to the O xy - plane Oxz - plane yz - plane O none of the abovef(x,y) = (x-3)2+(y+4) has a relative minimum at which point? O (0,0) O (3,-4) O(-4,3) O (1,5)The triangle with vertices P(0,0,0), Q (2,-1,2), and R (-1,0,1) has area o 6/2 O 3/2 3/2 2 3,2 4 O none of the above

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2 (x-572+(4+992 +(2+2 = Q - 81 q2 Center (5,- 9,-4) Radius 9 as see y co-ordinate of center is equal to radius. Sot xz Planeso the min is at (3,-4). Q P(0.0,0) G (2,-1,2) and R(-1,0,1) PQ -P (2,-1, 2) - (0,0,0) (2,-1,2) PR R-P (-1,0,1) -(0,0,0) (-1,P Q x PÅ 2 — 2 5(-1 -о) - (2+2) + К k (o-1) - і - чі - к 2 | РФ 88 x PŘ (1-1)2 + (-4) * + (-. JB 32 Area (A) в 2. 352 3 Г. 32

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