I have no idea what this is asking honestly but i hope you figure it out
Answer:
a) 20
b) 7
c) 18
d) 5
e) 36
f) 72
g) 10
Step-by-step explanation:
Tthe answer is 3. 3=S 4 x 3 + 1 = 13
Isolating the variable terms and dividing by 4, we have
Taking the square root, we have 
If we are dividing than it would be answer C because 8x2=16 and 16/2=8