False. They will never touch because they are running side by side on the same slope.
Shadow of the flagpole=23.5f
Sf=23.5
shadow of gilbert=7.5f
Sg=7.5
height of gilbert=5.5f
hg=5.5
Sf/hf=Sg/hg
23.5/hf=7.5/5.5
23.5*5.5/7.5=hf
(47/2*11/2)/7.5=hf
(517/4)/(30/4)=hf
(517*4)/(4*30)=hf
517/30=hf
17+7/30=hf
17.233.. feet=height of flagpole
Slope = (8 - 0)/(0 - 4) = -2
y intercept b = 8
y = mx + b where m = - 2 and b = 8
So equation y = -2x + 8
Answer
D. last one
y = -2x + 8