Someone please help me i don’t understand
A. 4
B. 8
C. 4,-4

A 4

Step-by-step explanation:

line AB is the same as AD

so you can plug x^2-3 to 13

now solve for x

add 3 to both sides --> x^2 = 16

square both sides --> X = 4

a

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