1- which ordered pair is the solution of the equation y=x-4 a - (2,6) b - (6,2) c - (-2,6) d - (-6,2) 2 - which ordered pair is a solution of the equation y=5x a - (-2,10) b - (-5,25) c - (-3,15) d - (-2,-10) 3 - which ordered pair is a solution of the inequality y = -9x + 4 a - (10,-86) b - (-4,-58) c - (6,-41) d - (-6,57)

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

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step-by-step explanation: