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Specify the period and amplitude for the function. C'A period: 3 amplitude: 6 O B period: 6 amplitude: 6 O C period: 6 amplitude: 3 O D period: 3 amplitude: 3 Two numbers add to 18. Express the sum of the squares of the two numbers in terms of a single variable. OA S(x) = x2 42x + 324 O B S(x) = 2x2 - 36x + 324 OC S(x) = x2 + 36x + 328 O D S(x) = 2x2 + 42x + 328