Which expressions have a sum greater than 20? Select all that apply. A 15.16 + 4.09
B. 0.8 + 19.3
C. 13.36 + 6
D. 8.3 + 11.8
DE 10.09 + 9.9

0.8 + 19.3 and 10.09 + 9.9

Step-by-step explanation:

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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.

0,0

step-by-step explanation: