Question

If f(x) = 5x + 40, what is f(x) when x = –5? –9 –8 7 15

Answer 1

its 15

Explanation:

i did this problem before

Hope i helped : )

Answer 2

`f(x)` is equal to 15 when
`x=-5`

Explanation:

Given a function
`f(x)` this means that the function ''f'' depends on the variable ''x'', If you want to obtain the value of
`f(x)` when
`x=a`,being ''a'' a possible value of x (this means ''a'' is in the domain of
`f(x)`) you only need to replace
`x=a` in the
`f(x)` equation

If
`x=-5` ⇒

`f(x)=5x+40\\f(-5)=5.(-5)+40=-25+40=15`

`f(-5)=15` this means that when
`x=-5` the function value is
`15`