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PLEASE HELP URGENT
Suppose that the functions r and s are defined for all real numbers x as follows.
r(x) = x + 5
s(x) = 3x + 1
Write the expressions for (r * s)(x) and (r + s)(x) and (r - s)(4) evaluate .

Respuesta :

Answer:r*s = 168

Step-by-step explanation: (2x-1)(6x) = 12 x^2 - 6x

r(s(x)) = 2 (6x) - 1 = 12 x - 1

r(x) - s(x) = (2x-1) - 6x = -4x -1

r(x) = s(x) when 2x-1 = 6x or x = -1/4

r(4) = s(4) never

(r*s)(4) = 12 x^2 - 6 x = 12*16 - 24 =168

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