Can someone me and explain this as soon as possible

y = -0.5 x + b

Through (1, 5.5) we get

5.5 = -0.5(1) + b

b = 6

y = -0.5x + 6

Through (3,p) we get

p = -0.5 (3) + 6 = 4.5

Through (7,n)

n = -0.5 (7) + 6 = 2.5

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

answer: the answer is ann