PLEASE HELP ME FAST IM CONFUSED!

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Solve the triangle. a = 21°, c = 105°, c = 5

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.