Answer:
Step-by-step explanation:
Put x = -7 to f(x) = 2x + 8:
f(-7) = 2(-7) + 8 = -14 + 8 = -6
use the substitution method
f(x)= 2x+8
f(-7)= 2(-7)+8
Mutiply first then add
Positive number times negative number = negative number
= -14+8
f(-7)= -6
Answer : f(-7)= -6
