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

Tags

CCSS.L.7.6

CCSS.L.9-10.6

CCSS.W.6.2D

CCSS.W.7.2D

CCSS.W.9-10.2D

How much does Steve charge for mowing one lawn?

• $20

• $15

• $10

• $8

Tags

CCSS.HSF.LE.B.5

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

• $20

• $50

• $30

• $40

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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

• 8X + 10

• 10X - 8

• 8X - 10

• 10X + 8

Tags

CCSS.6.EE.B.6

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

• $75

• $65

• $50

• $25

Tags

CCSS.6.EE.B.7

Which variable represents the number of shirts Maria buys?

• P

• M

• S

• T

Tags

CCSS.6.EE.B.6

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

• 25P + 50S + 65

• 65 + 25S + 50P

• 25S + 50P + 65

• 50S + 25P + 65

Tags

CCSS.HSA-SSE.A.1A

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

• $300

• $215

• $200

• $265

Tags

CCSS.6.EE.B.6

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

Tags

CCSS.7.EE.B.4A

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

• 13 years old

• 10 years old

• 15 years old

• 20 years old

Tags

CCSS.HSA-SSE.A.1A