Which of the following quantities is a variable? A. Number of minutes in an hour.
B. Number of inches in a foot.
C. Length of a person's arm.
D. Length of the Brooklyn Bridge

Length of a Brooklyn Bridge

Step-by-step explanation:

A variable is an unfixed pattern that is liable to change at any time

what is the graph

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