Which of the following best describes the expression 7x+2y?
•the sum of two products, there are two terms
• The product of two sums, there are two terms
• the sum of two products, there are four terms
• the product of two sums, there are four terms
•the sum of two products, there are two terms
• The product of two sums, there are two terms
• the sum of two products, there are four terms
• the product of two sums, there are four terms