The number of students in each of the seventh grade homerooms that volunteer in the office are shown in the table. use mental math to find the total number of students who volunteered. expain office volunteer homeroom number of students a. 6 b. 5 c. 4 d. 8 me

step-by-step explanation:

their are no angles. sorry cant .

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.