Flying against the wind, an airplane travels 8370 kilometers in 9 hours. Flying with the wind, the same plane travels 9730 kilometers in 7 hours. What is the rate of the plane in still air and what is the rate of the wind?
Note that the ALEKS graphing calculator can be used to make computations easier.
km
Rate of the plane in still air: 0
DO
h
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5
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km
Rate of the wind:
h
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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.

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

i agree because i see the other persons thinking is clear

what are the