If a number is a square root or a integer , then it is rational

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

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?