Can someone plz help
Find the common different of each arithmetic sequence:
1. -1, 6, 13, 20,...

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field