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12.5

Step-by-step explanation:

25 / 2 = 12 1/2

12 1/2 in decimal form is 12.5

12.5

Step-by-step explanation:

=>

In mixed form, it is

=>

And in decimal form, it becomes

=> 12.5

to rewrite a literal equation you may need to divide by a number, or by a variable.

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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