what is the percent decrease on a Tv that has been marked down from $550 to $420? round to the nearest tenth​

Steve is scuba diving near his home in maui. at one point he is 100 feet below the surface. represent this number with a negative number. if he descends another 5 feet, what negative number will represents his.

I'll give brainliest if you answer right : )

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20