Is there any one who can do most of these questions pls and thank you

#6 is x=9 #8 is x=-2 #10 is x=8 #12 is x=-1

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3