Simplify 6 + 7.2y - 4.2y + 1

3y+7

Step-by-step explanation:

6+7.2y+−4.2y+1

(7.2y+−4.2y)+(6+1)

3y+7

3y+7

Step-by-step explanation:

6+7.2y−4.2y+1

=6+7.2y+−4.2y+1

Combine Like Terms:

=6+7.2y+−4.2y+1

=(7.2y+−4.2y)+(6+1)

=3y+7

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