Writing Expressions for Real World Applications

The video tutorial explains how to write mathematical expressions from real-world scenarios. It provides three examples: calculating Steve's earnings from mowing lawns, Maria's shopping expenses, and Jose's age relative to his father's age. Each example involves defining variables, creating expressions, and solving them to model the given situations.

What is the first step in writing expressions from real-world situations?

• Graph the data

• Ignore the context

• Solve the equation

• Identify the variables involved

How much does Steve charge for mowing one lawn?

• $20

• $15

• $10

• $8

If Steve mows 3 lawns, how much does he earn before expenses?

• $20

• $50

• $30

• $40

What is the expression for Steve's total earnings after expenses if he mows X lawns?

• 8X + 10

• 10X - 8

• 8X - 10

• 10X + 8

What is the cost of one pair of shoes that Maria buys?

• $75

• $65

• $50

• $25

Which variable represents the number of shirts Maria buys?

• P

• M

• S

• T

What is the expression for the total cost of Maria's shopping?

• 25P + 50S + 65

• 65 + 25S + 50P

• 25S + 50P + 65

• 50S + 25P + 65

If Maria buys 2 shirts and 3 pairs of pants, how much does she spend in total?

• $300

• $215

• $200

• $265

How is Jose's age related to his dad's age?

• Jose is twice his dad's age

• Jose is half his dad's age

• Jose is seven years younger than two-thirds of his dad's age

• Jose is seven years older than two-thirds of his dad's age

If Jose's dad is 30 years old, how old is Jose?

• 13 years old

• 10 years old

• 15 years old

• 20 years old