G[f(x)]= g(x+4)
=(x+4)^2-1
=(x+4)(x+4)-1
=x^2+8x+16-1
Answer=x^2+8x+15
Answer:
see explanation
Step-by-step explanation:
To find k, calculate the ratio of corresponding sides, image to original, that is
k =
=
= 
Thus
QR' =
× QR =
× 21 = 2 × 3 = 6 , that is
x = 6 → C
1: ‘8’/3x = 1+ 5/3x
2: ‘8’/3x-5/3x= 1+ 5/3x-‘5/3x’
3: ‘3’/3x=1
4: 1
Khan academy has a lot on this sorry I couldn't answer bro