After substituting x = -5 in the given expression the result is f(-5) = 15 for the expression f(x) = 5x + 40
We have been given the expression
f(x) = 5x + 40
let us substitute x = -5 in the expression we have
f(-5) = 5(-5) + 40
f(5) = -25 + 40
f(5) = -25 + 40
Rearranging we have
f(5) = 40- 25
f(5) = 15
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The value of the function f(x) at x = -5 is .
A function is the relation between two sets. A function relates between a domain set and a range set.
The given function is:
f(x) = 5x + 40
Therefore, f(x) at x = -5 is
= f(-5)
= 5 × (- 5) + 40
= - 25 + 40
= 15
Therefore, f(x) at x = -5 is 15.
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