Question

If f(x)=5x-4 then find out f(5) and f(8).​

Answer 1

f(5)=25-4=21

f(8)=40-4=36

Answer 2

Answer

f(5)=21

f(8)=36

Step-by-step explanation:

let x = 5

f(x)=5x-4

f(5)=5(5)-4

f(5)=25-4

f(5)=21

similarly,

f(8)=5(8)-4

f(8)=40-4

f(8)=36