Write the equation for 30 is 75% of what number

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.

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

Is the point (0, 8) on the x-axis or y-axis? how do you know?