I need help plz and thank you

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Select all of the following expressions that are equal to 2.5.

Triangles abc and dfg are given. find the lengths of all other sides of these triangles if: b ∠a≅∠d, ab·dg=ac·df, ac=7 cm, bc=15 cm, fg=20 cm, and df-ab=3 cm.