Final answer:
The statement that the expression 2cd + d - 5c + 7 has four terms is true, as each part of the expression separated by a plus or minus sign is considered an individual term. Therefore given statement is true
Step-by-step explanation:
The statement about the expression 2cd + d - 5c + 7 having four terms is true. In algebra, a term is a single mathematical expression that can be a constant, a variable, a coefficient multiplied by a variable, or constants and variables multiplied together.
Here, 2cd, d, -5c, and 7 are all separate terms because they are not like terms and cannot be combined.
Each one is separated by a plus or minus sign.