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Chapter 1: Q1. (page 7)

Identify the variable in the expression 21+d.

Short Answer

Expert verified

The variable in the expression isd.

Step by step solution

01

Step 1. Apply the concept of Variable.

In any expression or equation, the variable is an unknown quantity. It may be any alphabet or any special symbol.

02

Step 2. Example for the variable.

In the expression 2x+3, the unknown quantity is x. So, the variable in this expression is x. 2 and 3 are constants values.

03

Step 3. Identify the variable.

In the given expression 21+d, 21 is a constant value while d is the unknown quantity.

So, the variable in the given expression is d.

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