The variables x and y are proportional. Use the values to find the constant of proportionality. Then write an equation that relates x and y . Write any fractions in simplest form. When y=20 , x=12 .

560

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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

part a: 1.08

part b: 27.59