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# What is the variable of an expression?

## What is the variable of an expression?

A variable is a symbol that stands in for an unknown value in a mathematical expression. We can use any symbol as a variable, but letters are most commonly used. A term is a single number, variable, or a number and a variable multiplied together.

What is the variable in the expression y 7?

In the expression y – 7, y is the variable and – 7 is the constant.

What is the variable in an equation?

Variable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation. Commonly used variables include x and y (real-number unknowns), z (complex-number unknowns), t (time), r (radius), and s (arc length).

### What is variable give an example?

A variable is a quantity that may be changed according to the mathematical problem. The generic letters which are used in many algebraic expressions and equations are x, y, z. In other words, a variable is a symbol for a number where the value is not known. For example, x + 5 = 10. Here “x” is a variable.

How to find the value of the expression 2y-5?

Thus as y takes on different values, the value of 2y – 5 goes on changing. When y = 2, 2y – 5 = 2 (2) – 5 = –1; when y = 0, 2y – 5 = 2 × 0 –5 = –5, etc. Find the value of the expression 2y – 5 for the other given values of y.

What is the value of the expression 4xy + 7?

The expression 4xy + 7 is formed from variables x and y and constants 4 and 7. We know that, the value of y in the expression, 2y – 5, may be anything.

#### How does the value of y change in an expression?

We know that, the value of y in the expression, 2y – 5, may be anything. It can be 2, 5, –3, 0,5/2 ,-7/3 etc.; actually countless different values. The value of an expression changes with the value chosen for the variables it contains. Thus as y takes on different values, the value of 2y – 5 goes on changing.

Which is the part of the expression 5Y + 7?

This quiz is incomplete! To play this quiz, please finish editing it. This quiz is incomplete! To play this quiz, please finish editing it. Q. Identify the Variable in the expression 5y+7?