Triangle angle I need help with problem 4,5,6,7,8 4, 123degrees 5x+3
5, 120 degrees 152 ,6s+2
6, 49 degrees 82, 3n+1
7, 107 degrees 52, 2a+1
8, 111 degrees 147, 4v

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.

it is 32.5

i hope i could u.

the answer for the question that you are asking is 4