Question

Expressions and Equations

Think about a scenario when you would use an expression and an equation in a real life application. Discuss each scenario and explain how to write the expression and equation. What is the difference between both of them?

Create two sample equations for your peers to solve.

Please give me an answer ASAP Something new that not already on the Chegg site.

Answer 1

A variable expression is a mathematical phrase that contains numbers, operations, and variables.

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

When you convert this we called as equation.

Example 1:

Sameer caught 20 fish and then ate some. Write an expression to represent the number of fish Sameer has left.

1st, decide on your variable. You don't know how many fish Sameer ate.

Let x equal the number of fish Sameer ate.

Next, write a variable expression using x. Sameer started with 20 fish, but then ate some. This means he will end up with less fish than he started with.

So subtract the number of fish he ate from the number he started with.

Then expression is

20−x

The answer is Sameer now has 14−x fish where x is the number of fish Sameer ate.

Example 2:

Sameer runs the some number of kilometres each day. Write an expression to represent the number of kilometres Sameer ran in may month.

1st, decide on your variable. You don't know how many kilometres Sameer runs each day, but you know every day it is the same.

Let k equal the number of kilometres Sameer runs each day.

Next, write a variable expression using k. In one day Sameer runs k miles. In 2 days John runs 2k kilometres. The question asks for an expression that represents how many kilometres Sameer ran in may. May is a month with 31 days. So your expression is

31k

The answer is Sameer ran 31k miles in may month where k is the number of kilometres he runs each day.