2x = 5x - 30 how do i get x

What expression is equivalent to log3(x+4)

Select the two pairs of figures that are similar.

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?