What is the value of the expression 9+4n-1 when n = 3?

15

20

36

38

20

Step-by-step explanation:

Evaluate by substituting n = 3 into the expression

9 + (4 * 3) - 1 ← evaluate the multiplication before adding / subtracting

= 9 + 12 - 1

= 21 - 1

= 20

First you multiply 4*n and n=3 so 4*3 = 12

then you have 9+12-1

9+12 = 21

21-1=20

so your answer would be 20