Help! Equivalent expressions (7th grade) match the ones that go are equivalent. Each expression can only be used once Expressions
1/3x + 1/4 - 2/3x
1/3x + 1/4 + 2/3x
2/3 + 3/4x - 1/3

Equivalent expression options
-1/3x + 1/4
x + 1/4
3/4x + 1/3

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?