Help me please​

Option 1: $30 an hour plus a nonrefundable deposit of $50 option 2: $20 an hour plus a nonrefundable deposit of $75 kyle is renting a jetski for the day. if he can rent the jetski in one hour increments, what is the minimum number of hours must he rent the jetski for option 2 to be a better deal then option 1?

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

The suare root of 9x plus 7 plus the square rot of 2x equall to 7