Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Which out of the following are expressions with numbers only?(a) $y+3$(b) $(7\times 20)-8z$(c) $5(21-7)+7\times2$(d) 5(e) 3x(f) $5-5n$(g) $(7\times 20)-(5\times 10)-45+p$
Given :
The expressions with variables and numbers are given.
To do :
We have to choose expressions with only numbers.
Solution :
Variable:
A variable is denoted by a symbol that can take any real value. The value of a variable is not fixed.
The letters x, y, and z are generally used for variables.
Therefore,
(a)$ y+3$ is an expression with the variable y.
(b)$(7\times 20)-8z$ is an expression with variable z.
(c) $5(21-7)+7\times2$ is an expression with only numbers.
(d) 5 is an expression with only numbers.
(e) 3x is an expression with the variable x.
(f) $5-5n$ is an expression with the variable n.
(g) $(7\times 20)-(5\times 10)-45+p$ is an expression with the variable p.
Therefore, $5(21-7)+7\times2$ and 5 are expressions with only numbers.
28 Views
