Mariana wears her winter coat when the temperature is colder than − 4 c . write an inequality that is true only for temperatures ( t ) at which mariana wears her winter coat.

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Identify the graph of y = ln x + 1.

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.