The ordered pair (x, y) satisfies the system of equations
2y – x= -7
x + 2y = 3
What is the value of 4y?

Solve the second equation for 2y

Substitute the given value of 2y into the first equation

Solve the equation for x

Substitute the given value of x into the second equation

Solve the equation for y

The possible solution to the system is ordered pair (x,y)

Now, Find the value of 4y with the given value of y

Plug in the value of y i.e. -1

Multiply the numbers

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

step-by-step explanation: