Ineed the answer ! geometry is very hard

12.5

step-by-step explanation:

you have to make an assumption about the diagram. you have to assume that the angle formed by 10 and x is bisected. the diagram is very misleading.

if that is so, 2 ratios are formed: 10/8 and x/10

these ratios are equal. note: it is always a good idea to put the unknown amount in the numerator (top part of the fraction) in a proportion.

10/8 = x/10                 multiply both sides by 10

10*10/8 = x                 do the multiplication

100/8 = x                     do the division

12.5 = x

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

thats one

step-by-step explanation: