Question

6. If f(x) = –8 – 5x, what is f(–4)? f(–4) = 12 f(–4) = –28 f(–4) = –12 f(–4) = 28

Answer 1

For this case we have a function of the form:

`y = f (x),` where:

`f (x) = - 8-5x`

We want to know the value of the function when
`x = -4,` that is,
`f (-4).`

Substituting we have:

`f (-4) = - 8-5 (-4)`

We have by law of multilplication of signs that:

`- * - = +\\f (-4) = - 8 + 20`

Different signs are subtracted and the sign of the major is placed.

`f (-4) = 12`

Answer:

Option A

Answer 2

f (-4) = 12.

Explanation:

If f(x) = –8 – 5x, what is f(–4)?

substitute -4 to ur value of x

that is f(-4)= -8 -5(-4)

f(-4) = -8+20

f(-4) =12.