To the nearest cent, what is the cost of 10.2 gallons of gasoline at $2.439 per gallon

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.

For what value of (y) is 3^3/3^y =1/9

Find the domain and range of the following function f(x) = 51x - 21+ 4