On a recent survey, 70% of those surveyed, said that they preferred drinking Coke instead of Pepsi. If 420 people preferred Coke, how many people were surveyed in all?

idk

step-by-step explanation:

answer: i think it is (1,-2)

i found two solutions,   n = 2 • ± √3 = ± 3.4641

step-by-step explanation:

hope it you

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