Find the image of ( 1 , 2 ) after a reflection about y = x followed by a reflection about y = - x

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236