Model Situations with Expressions

General Skills

You’ll turn everyday situations—like shopping, work, and travel—into expressions that represent real relationships. You’ll build expressions step by step, use grouping when needed, and recognize when different expressions represent the same situation.

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4 lessons

20 practices

1 hour

Mathematical Modeling

Course details

Translate Situations into Expressions

Preview

From Phrases to Expressions

Complete Simple Expressions

Write Expressions From Situations

Match Situations To Expressions

Model a Rideshare Trip

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From our community

Hear what our customers have to say about CodeSignal Learn

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11

I love that it's personalized. When I'm stuck, I don't have to hope my Google searches come out successful. The AI mentor Cosmo knows exactly what I need.

Faith Yim

Software Engineer

+14

It's an amazing product and exceeded my expectations, helping me prepare for my job interviews. Hands-on learning requires you to actually know what you are doing.

Alex Bush

Full Stack Engineer

I'm really impressed by the AI tutor Cosmo's feedback about my code. It's honestly kind of insane to me that it's so targeted and specific.

Abbey Helterbran

Tech consultant

I tried Leetcode but it was too disorganized. CodeSignal covers all the topics I'm interested in and is way more structured.

Jonathan Miller

Senior Machine Learning Engineer

+12

I'm impressed by the quality and can't stop recommending it. It's also a lot of fun!

Francisco Aguilar Meléndez

Data Scientist

+11