Answer:
Option C) -51 is correct
That is the evaluated function 5-2[f(-1)]=-51 is correct
Explanation:
Given that the function f is defined by f(x)=-8x+20 and to find the value for the given function 5-2[f(-1)]
First find f(-1) :
Put x=-1 in the function f(x)=-8x+20 we get
f(-1)=-8(-1)+20
=8+20
Therefore f(-1)=28
Now substitute f(-1)=28 in the function 5-2[f(-1)] we get
5-2[f(-1)]=5-2[28]
=5-56
=-51
Therefore 5-2[f(-1)]=-51
Therefore option C) is correct
That is 5-2[f(-1)]=-51 is correct