Write down in terms of n an expression for the nth term -7,-12,-17,-22,-27

Adozen bananas weigh 3 pounds how many ounces does 1 banana weigh

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?