Answer:
B. 8
Step-by-step explanation:
Given the equation,
,
where,
s = shoe size,
f = foot length,
To determine the shoe size of a man that has a foot length (f) of 9 in, substitute f = 9 into the equation.
(substitution)



His shoe size is approximately 8 inches
Answer:
2,160 seconds
Step-by-step explanation:
#8 is not a function because there are two 8 on the x axis. In order for this to be a function there can only be 1 input to an output
Your zeroes are x=-2, x=sqrt 3 i, and x=-sqrt3 i