Question

If b(x) = 4x + 1, then what is the value of b(4)?
1
9
17
20

Answer 1

b (1)=4*1+1=4+1=5
b (9)=4*9+1=36+1=37
b (17)=4*17+1=68+1=69
b (20)=4*20+1=80+1=81