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Chapter 1: Q38. (page 7)

Error Analysis Describe and correct the error in writing a variable expression for the difference of a number and 31.

Short Answer

Expert verified

The variable expression for the difference of a number and 31 is p-31.

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

Let the unknown number be p.

The given expression is for the difference of 31 and the unknown number p.

In order to write the variable expression for the given phrase, subtract 31 from the unknown number p.

So, the variable expression to represent the phrase is p-31.

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