McKaila got on her bicycle on the sidewalk in front of her house. She rode 20 feet down the sidewalk to her friend's house next door. Then, the two of them rode another 75 feet in the same direction to their friend's house down the street. What was McKaila's overall change in position from when she started riding her bicycle at her own house?

Change in position = 95 feet

Step-by-step explanation:

Overall change in position = 75+20 = 95 feet

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.