What best describes what happens when you compose two functions

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Which expression is equivalent to the expression shown?

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.