# How are variables used in real life?

## How are variables used in real life?

You can use a variable expression to describe a real world situation where one or more quantities have an unknown value or can change in value. To write a variable expression for a real world situation: Figure out which quantity in the situation is unknown and define a variable to represent the unknown quantity.

### What is an example of an expression with a variable?

A variable is a letter whose value is unknown to us. For example, x is our variable in the expression: 10x + 63. The coefficient is a numerical value used together with a variable. For example, 10 is the variable in the expression 10x + 63.

#### What are the real life examples of continuous random variable?

For example, the height of students in a class, the amount of ice tea in a glass, the change in temperature throughout a day, and the number of hours a person works in a week all contain a range of values in an interval, thus continuous random variables.

**What real life situations can you most associate mathematics?**

Math Matters in Everyday Life

- Figuring out distance, time and cost for travel.
- Understanding loans for cars, trucks, homes, schooling or other purposes.
- Understanding sports (being a player and team statistics)
- Playing music.
- Baking.
- Home decorating.
- Sewing.
- Gardening and landscaping.

**What is a variable expression?**

A variable expression (or) an algebraic expression is a combination of terms by the operations such as addition, subtraction, multiplication, division, etc.

## What are some experiments with variables?

Ideas for Controlled Variable Science Projects

- Does Sugar Dissolve More Quickly in Warm or Cool Water?
- Does a Plant Grow Better in Direct or Indirect Sunlight?
- Will a Baby Bunny Grow Bigger When Fed Rabbit Food or Fresh Vegetables?
- Which Will Clean a Penny Faster, Water or Vinegar?

### What is real life application in maths?

Algebra. Differential Equations and Fourier Analysis. Differential and Computational Geometry. Probability and Statistics.

#### What is a good example of a continuous variable?

A variable is said to be continuous if it can assume an infinite number of real values within a given interval. For instance, consider the height of a student. The height can’t take any values. It can’t be negative and it can’t be higher than three metres.