Help pls 6th grade math

All of them are correct except for the last one which is incorrect

Step-by-step explanation:

All you need to substitute the answers given for "r" and see if its less than or equal to 2

- 3.5 2 Correct (negative numbers are always smaller than a positive number)

- 2 2 Correct (negative numbers are always smaller than a positive number)

-1 2 Correct ( negative numbers are always smaller than a positive number)

0  2 Correct ( 0 has a value much more less than the value of 2)

2 2 Correct (they both have the same value as "2")

4  2 Incorrect ( 4 has a much more greater value than 2, therefore this is incorrect)

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.

yes

step-by-step explanation: