Which of the following is a function and a relation?​

What is always true when two whole numbers are subtracted?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.

Asail is in the form of a right triangle that is 3 times as high as it is wide. the sail is made from 6 square meters of material. what is the height?