Can someone average this out for me and for the term test I made a 36​

Which of the following would represent the sum of 3 consecutive integers if x is the first integer?

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?

Charlie is at an amusement park that has 18 different rides. each ride costs $1.75. the function c(r) = 1.75r represents the total amount of money that charlie will spend if he goes on r rides, but he never goes on the same one more than once. what domain and range are reasonable for the function?