1 / 15

Do Now:

Do Now:. Use elimination. 1. 2. The sum of two numbers is 20. Their difference is 4. Find the numbers. Answer : 12 and 8. (11/3, 2/3). More Elimination Method. Coordinate Algebra Standard: A.REI.6. Essential Question.

idalee
Download Presentation

Do Now:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Do Now: Use elimination. • 1. • 2. The sum of two numbers is 20. Their difference is 4. Find the numbers. Answer: 12 and 8 (11/3, 2/3)

  2. More Elimination Method Coordinate Algebra Standard: A.REI.6

  3. Essential Question • How do I solve a system of equations using the ELIMINATION method?

  4. Ex. 1) Use Elimination • Answer: (-1, 4)

  5. Ex. 2) Use Elimination • Answer: (2, 1)

  6. Bonus Example: (-1, 2, -1)

  7. Assignment:

  8. Do Now: • Solve each system using any method you choose. • 1. y = 5x x + 2y = 22 • 2. 2y – x = -5 4y – 3x = -1 (2, 10) (-9, -7)

  9. WORD Problems EQ • How do I solve word problems using systems of equations?

  10. Coin Word Problems • Formula: (price1)(amount1) + (price2)(amount2) + etc. = Total $$$$$ Quarter price is: 0.25 Dime price is: 0.10 Nickel price is: 0.05 Penny price is: 0.01

  11. Ex 1) • Sam has $2.05 in quarters and dimes. He has four more quarters than dimes. How many does he have of each coin? • Answer: 3 dimes & 7 quarters

  12. Ex 2) • A kindergarten class collected $3.50 in nickels and dimes for the American Red Cross. In all they collected 45 coins. How many of each did they collect? • Answer: 20 nickels & 25 dimes

  13. Age Word Problems • For age word problems, you simply translate. • Remember, “less than” and “subtracted from” statements get reversed when you write their expressions. Also, “Younger than!”

  14. Ex 3) • Suzy is 8 years younger than her sister Madeline. If the sum of their ages is 32, how old are they? • Answer: Madeline is 20 yrs. old & Suzy is 12 yrs. old

  15. Ex. 4) • Eight more than twice Joe’s age is 9 years less than 3 times his age. How old is he? • Answer: Joe is 17 years old

More Related