Which of the following best describes the expression 3x + 2y + 8z?

the product of three sums; there are three terms
the sum of three products; there are three terms
the product of three sums; there are six terms
the sum of three products; there are six terms

The expression above is composed of 3 terms which are: 3x, 2y, and 8z. All of the terms are the product of two items. The first term is a product of 3 and x. The second is a product of 2 and y. Lastly, the third is a product of 8 and z. 

Thus, the expression is a sum of three products and there are only three terms. This answer is the second among the four choices.

hope this helps    :    )