Answer:
5
Explanation:
there are five terms: 5xy, 9yz, 3zx, 5x, and 4y.
In mathematics, a term is a part of an expression that is separated by a plus or minus sign. In this expression, the terms are 5xy, 9yz, 3zx, 5x, and 4y. Note that the equation in the question is formatted a little awkwardly, so make sure to count how many terms you see yourself too!