A shipping service uses the weight of a package to determine its postage. The charge is $3 for the first pound and $2 for each additional pound up to 5 pounds. What are the domain and range of the function? Please help me F (X) 3, 0 < x ≤ 1

5, 1 < x ≤ 2

7, 2 < x ≤ 3

9, 3 < x ≤ 4

11, 4 < x ≤ 5​

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?