Matteo's family took a trip to visit some relatives they drove for 2 1/2 hours at 55 miles per hour to get there but the trip home took them 15 minutes longer. at what speed were they traveling on the drive home

20 miles per hour.

Step-by-step explanation:

We have been given that Matteo's family took a trip to visit some relatives they drove for 2 1/2 hours at 55 miles per hour to get there.

As the trip to home took 15 took minutes longer, so the total time taken to cover the same distance will be:

Therefore, Matteo's family were travelling on the drive home at a speed of 20 miles per hour.

nothjing

step-by-step explanation:

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.