This is for my exit ticket can someone please help me understand

X = 7

Plz double check my work, in case it wrong. Dont want it to be wrong and then you be wrong

Step-by-step explanation:

If you need the answer 21, and you have to find a way to get what the value of X is, you will have to use subtraction from 21.

21 minus 10 = 11.

11 minus 4 = 7 There fore, the answer should be 7 for X

Double check it by doing (7 + 4) + 10 = 21

                                            11 + 10 = 21

                                               21 = 21

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.

answer: the answer is e

step-by-step explanation: