C. Fill in the blanks with the correct answer. that has only one variable is the exponent of that 3 variable 2. that has only one variable is the highest power appearing in any of the terms. an algebraic expression that contains a single or multiple terms with positive whole number exponents on the variables. algebraic expression separated by the plus (+) or minus (-) symbol. a variable, a number, or a collection of variables and numbers related by at least a fundamental operation or grouping symbol. 4 5