Need halp asap !
solve each equation by writing a linear-quadratic
system and solving using the intersection feature
of a graphing calculator.
21. 6x2 - 15x + 8 = 17 - 4x
22. 7x2 – 28x + 32 = 4
23. -5x - 10 = -2x2 - x - 3

i need a picture

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

i do not know the answer

step-by-step explanation: