Answer 7 and 8 2 questions for brainliest answers ugrent !

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

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.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much