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[" (A) "(1)/(5)quad " (B) "(1)/(50)quad " (C) "(1)/(625)],[" 13.afe "(2k-1,k)" friftant "10x-9y=12" and "(625)/(61)," in "k=(1)/((D)4)],[[" (A) "1," (B) "2," (C) "3," (D) "4]]

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If (2k-1,\ k) is a solution of the equation 10 x-9y=12 , then k= ?

If 10^(2y)=25, then 10^(-y) equals -(1)/(5)(b)(1)/(50) (c) (1)/(625) (d) (1)/(5)

If (2k-1, k) is a solution of the equation 10 x-9y=12 , then k= (a) 1 (b) 2 (c) 3 (d) 4

If 10^(2y)=\ 25\ , then 10^(-y) equals (a) -1/5 (b) 1/(50) (c) 1/(625) (d) 1/5

[(625)^(-1/2)]^(-1/4)

If x^2 + 5x - 2 k , is exactly divisible by (x-1), then the value of K is (A) 1 (B) 2 (C ) 3 (D) 4

Lines (x-2)/(1)=(y-3)/(1)=(z-4)/(-K) and (x-1)/(K)=(y-4)/(2)=(z-5)/(1) are coplanar if