What is the best estimate for this sum? don't guess :D 1/3+4/7

The sum will be close to 0.

The sum will be close to 12.

The sum will be close to 1.

The sum will be close to 1.

Step-by-step explanation:

Let's see:

Rewrite 1/3 into 7/21

Rewrite 4/7 into 12/21

Add: 19/21

And 19/21 is 0.90476190476

Thus it is close to 1

Hope this helps!

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.