Anumber plus double itself is equal to 19 what is it

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Which equation represents a direct linear variationa. y=x2b. y=2/5xc. y=1/xd. y=x+3

On this question. a hypothermia occurs when a person's body temperature drops below 95 degrees fahrenheit. write and solve an inequality that describes how much lower the body temperature of a person with hypothermia will be than the body temperature of a person with a normal temperature of 98.6 degrees fahrenheit