Two cyclists, 120 Km apart, approach each other, each pedalling at 20 Km per hour. A fly starts at one cyclist, flies towards the other one, then bounces off it and thus flies back and forth between the two cyclists at 25 Km per hour. When the cyclists meet head on and squash the fly between them, how far has the fly flown while going back and forth?

answer: -1

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.

according to egenuity the answer is

step-by-step explanation:

d. 344.22

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value