f(x)=-6(1-x) what is the value of f(-8)

To find the value of f(-8), we need to substitute -8 for x in the function f(x) = -6(1-x):

f(-8) = -6(1-(-8))
f(-8) = -6(1+8)
f(-8) = -6(9)
f(-8) = -54

Therefore, the value of f(-8) is -54.