Question

f(x)=11x + 8
the function gives the total number of people on a city tour with x tour guides. what is the total number of people on a city tour with 11 tour guides?

Explanation:

Step1: Substitute x value

Substitute $x = 11$ into $f(x)=11x + 8$.
$f(11)=11\times11 + 8$

Step2: Calculate multiplication

Calculate $11\times11$.
$11\times11=121$, so $f(11)=121 + 8$

Step3: Calculate addition

Calculate $121+8$.
$f(11)=129$

Answer:

129