Let the angle of elevation be x, then
tan x = 1/12
x = arctan (1/12) = 4.8 degrees.
60 inches since one foot is 12 inches, 5 x 12 = 60
About 260 kids have blue eyes or prefer blue eyes
3s(s-8)=0
3s = 0 s-8 =0
s=0 s= 8
A - 3b = 4 . . . . (1)
a = b - 2 . . . . . (2)
Putting (2) into (1), we have
b - 2 - 3b = 4
-2b = 4 + 2 = 6
b = 6/-2 = -3
From (1), a = b - 2 = -3 - 2 = -5
Hence, solution = (-5, -3)