Is my answer correct? :D

What are the domain and range of the functiony = 2(x - 3)2 + 4?

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers