Amotorboat maintain a constant speed of 60 mph relative to the water in going 55 miles upstream and then returning. the total amount of time for the trip was eight hours. what is the speed of the current ?

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step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

y -5 = (-1/4)(x + 8)

step-by-step explanation: