Question

Lan has three pens and some does she need an algebraic expression to represent the number of writing tools she has?

a. 3x
b. 3+x
c. 3−x
d. 3×x

Answer 1

The algebraic expression representing the total number of writing tools that Lan has, including three pens and some pencils, is '3+x'.

Step-by-step explanation:

Given that Lan has three pens and an unspecified number of pencils, we need to find an algebraic expression to represent the total number of writing tools she has. If we let x represent the number of pencils, then the total number of writing tools is the sum of the pens and pencils. Hence, the correct algebraic expression is 3+x, which corresponds to option b. This expression indicates that Lan has 3 pens plus x pencils.