Evaluate the expression for the given values?

- 5

Step-by-step explanation:

Given

x² - y² ← substitute x = 2 and x = - 3 into the expression

= 2² - (- 3)²

= 4 - 9

= - 5

if x decreases by 4 then y increases by 10

step-by-step explanation:

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