1. The problem asks to write the phrase "5 times a number d" as an algebraic expression. 2. To write expressions from phrases, identify the numbers and variables involved and the operations connecting them. 3. "5 times a number d" means multiply 5 by the variable d. 4. The algebraic expression is therefore $$5d$$. 5. An expression is a combination of numbers, variables, and operations (like addition, subtraction, multiplication, division) without an equality sign. 6. The blue square with the number "10" is likely a visual aid but does not affect the expression for "5 times a number d". Final answer: $$5d$$