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# Check it out! - PowerPoint PPT Presentation

Check it out!. 2.1.3: Solving Linear Inequalities. Luc received \$50 from his grandparents for his birthday. He makes \$75 each week as a cashier at the supermarket . Since his birthday, he has saved more than enough money to buy a game system that costs \$450.

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2.1.3: Solving Linear Inequalities

Luc received \$50 from his grandparents for his birthday. He makes \$75 each week as a cashier at the supermarket. Since his birthday, he has saved more than enough money to buy a game system that costs \$450.

How many weeks ago was Luc’s birthday?

After purchasing the game system, will Luc have any money left over? How do you know?

2.1.3: Solving Linear Inequalities

How many weeks ago was Luc’s birthday? makes \$75 each week as a cashier at

Set up and solve an inequality to find how many weeks ago Luc had his birthday.

50 + 75w > 450

75w > 400

Luc is paid for whole weeks of work, not partial weeks, so round up to the nearest whole week.

Luc has been saving for at least 6 weeks.

2.1.3: Solving Linear Inequalities

After purchasing the game system, will Luc have any money left over? How do you know?

If Luc saved his wages of \$75 a week for 6 weeks, he would have saved \$450 plus the \$50 from his grandparents, for a total of \$500.

The game system costs \$450, so Luc would have \$50 left after his purchase.

2.1.3: Solving Linear Inequalities