Question

Determine f(4) for the function f(x)=2/5x+11​

Answer 1

63/5 in improper form and 12 and 3/5 in mixed form

Explanation:

f(x) = 2/5x + 11

Substitute in value of x for the equation

f(4) = 2/5(4) + 11

f(4) = 8/5 + 11

f(4) = 8/5 + 55/5

f(4) = 63/5 or 12 and 3/5

So, the answer should be 63/5 in improper form and 12 and 3/5 in mixed form.

Answer 2

Explanation:

f(x) =
`(2)/(5)x + 11`

f(4) =
`(2)/(5)*4 +11\\`

`=(8)/(5)+11\\\\=(8)/(5)+(11*5)/(1*5)\\\\=(8)/(5) + (55)/(5)\\\\=(63)/(5)\\\\=12(3)/(5)`