Another name for positive integers is

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Which of the functions below could have created this graph?

‼️‼️‼️‼️‼️the pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is 440 f, find the pressure exerted when the temperature of the gas is 380°f. (show work)