Train A has a speed 20 miles per hour greater than that of train B. If train A travels 200 miles in the same times train B travels 120 miles, what are the speeds of the two trains?

please sa mga nag sagut ng mali dito wag nyo naman sabihan ng ubub kayu nagatong nakahanp sasabiha nyopa ng ubub

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.

the height of the surface increases from the center out to the sides of the road

it is c!