If a + 7b + 4c = 2, what is 36c + 9a + 63b?

18

Step-by-step explanation:

a + 7b + 4c = 2,

Multiply this equation by 9

9( a + 7b + 4c) = 2*9

9a + 63b +36c = 18

Rearrange the order

36c +9a +63b = 18

18

Step-by-step explanation:

36c+9a+63b= collecting 9:

=9*(4c+a+7b)

so it is 4 times the given a+7b+4c which in the definition is equal to 2; so:

=9*(4c+a+7b)=9 * 2=18

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