Which represents the solution(s) of the system of equations, y = x2 – 4x – 21 and y = –5x – 22? determine the solution set algebraically. (–1, –17) (1, –27) (–1, –17) and (1, –27) no solutions

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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

answer: x=60