Answer:
f(-7) = 15
Explanation:
Subsitute x = - 7 into f (X) = - 3 (x+2)
f(-7) = -3 x (-7+2)
calculate the sum or difference
f(-7) =-3 x (-5)
determine the sign for multiplication or division
f(-7)=3x5
calculate the product or quotient
f(-7)=15
final awnser f(-7)=15