Answer:
22
Step-by-step explanation:
f(2) : 2*2 = 4 , 4+4 = 8
f(5) ; 2*5 = 10 ; 10+4 = 14
8+14 = 22
f(2) = 8, f(5) = 14.
in f(2), 2 will replace x. in f(5), 5 will replace x.
f(2)= 2(2) + 4.
f(2)= 4 + 4.
f(2)= 8
f(5)= 2(5) + 4
f(5)= 10+ 4
f(5)= 14
