In Exercises 27–38, evaluate each function at the given values of the independent variable and simplify.f(x)=4x+5 c. f(-x)

In Exercises 11–26, determine whether each equation defines y as a function of x. x = y²

In Exercises 11–26, determine whether each equation defines y as a function of x. xy - 5y =1

In Exercises 11–26, determine whether each equation defines y as a function of x. |x| − y = 2

In Exercises 27–38, evaluate each function at the given values of the independent variable and simplify.f(x)=4x+5 a. f(6)

Evaluate each function at the given values of the independent variable and simplify. $f\left(r\right)=\sqrt{r+6}+3$

$\text{a. }f(-6)$

Evaluate each function at the given values of the independent variable and simplify. $f\left(r\right)=\sqrt{r+6}+3$

$\text{a. }f(x-6)$