Is this correct, if good please help

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

What is the ratio of the length of an object in yards to the length of the same object in miles?