What is -2 + something = 10

12.

Step-by-step explanation:

It is simple. If you look at the answer and think "If I'm at -2 on a number line, how many am I going to count to get to 10? Try looking up a number line or making one. You can also take the answer plus the -2 that you have to equal 12. Hope this helps.

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

3x + 4y -25 =0 represents the amount of change sianna should recieve