How many 10ths equivalent to 3/5

Solve for x i'll try to attach the files bc it's not letting me for some reason

The table shows the distance traveled over time while traveling at a constant speed.

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.