Algebra 1

Lesson 18

More Applications of Linear Systems

The Birthday Party Planner

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Mia's birthday is coming up, and she has big plans. But first, she needs to figure out two things — and each one needs a different kind of math.

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Challenge 1: The Bracelet Business

Mia spent $60 on party supplies. To earn the money back, she's making friendship bracelets to sell at school. Each bracelet costs $2 to make and she sells them for $5 each.

How many does she need to sell to break even?

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Challenge 2: The Party Plan

Mia has a $120 budget for the party and can invite at most 10 friends. Bowling costs $15 per person and movies cost $10 per person.

What combinations of activities work?

One question has a single answer. The other has many. Let's see why that matters.