1 / 27

Math 71A

Math 71A. 1.5 – Problem Solving and Using Formulas. ex: Four times the sum of 3 and a number. ex: Four times the sum of 3 and a number. ex: Four times the sum of 3 and a number. ex: Four times the sum of 3 and a number. ex: 5 less than the quotient of a number and 3.

blaze
Download Presentation

Math 71A

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. Math 71A 1.5 – Problem Solving and Using Formulas

  2. ex: Four times the sum of 3 and a number.

  3. ex: Four times the sum of 3 and a number.

  4. ex: Four times the sum of 3 and a number.

  5. ex: Four times the sum of 3 and a number. • ex: 5 less than the quotient of a number and 3.

  6. ex: Four times the sum of 3 and a number. • ex: 5 less than the quotient of a number and 3.

  7. ex: Four times the sum of 3 and a number. • ex: 5 less than the quotient of a number and 3.

  8. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers?

  9. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Read problem, figure out what it’s asking for, and let represent one of the unknown quantities.

  10. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Read problem, figure out what it’s asking for, and let represent one of the unknown quantities. • ex: Let be the smaller number.

  11. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Read problem, figure out what it’s asking for, and let represent one of the unknown quantities. • ex: Let be the smaller number. • 2. Write expressions for other unknown quantities.

  12. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Read problem, figure out what it’s asking for, and let represent one of the unknown quantities. • ex: Let be the smaller number. • 2. Write expressions for other unknown quantities. • ex: The larger number is .

  13. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Write equation in based on some part of the problem.

  14. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Write equation in based on some part of the problem. • ex:

  15. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Write equation in based on some part of the problem. • ex: • Solve equation, and answer problem.

  16. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Write equation in based on some part of the problem. • ex: • Solve equation, and answer problem. • ex: . So, the numbers are 4 and 6.

  17. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Write equation in based on some part of the problem. • ex: • Solve equation, and answer problem. • ex: . So, the numbers are 4 and 6. • 5. Check solution.

  18. Ex 1. A number is two more than another number. The sum of the numbers is 10. What are the two numbers? • Write equation in based on some part of the problem. • ex: • Solve equation, and answer problem. • ex: . So, the numbers are 4 and 6. • 5. Check solution. • ex: Indeed, 6 is two more than 4, and .

  19. Ex 2.You are choosing between two pay-as-you-go cell phone plans. The one from Me-Tobile is $15 plus $0.08 per minute, and the one from Revison is $3 plus $0.12 per minute. After how many minutes of usage do the cell phone plans cost the same?

  20. Ex 3.You buy a Math 71 textbook with a 30% discount for $87.50. What was the book’s price before the discount?

  21. Ex 4.The length of an American football field is 200 feet more than the width. If the perimeter of the field is 1040 feet, what are its dimensions? (Hint: )

  22. Sometimes, we’ll want to rewrite a formula (like ) so it’s solved for a different variable (like ).

  23. Sometimes, we’ll want to rewrite a formula (like ) so it’s solved for a different variable (like ). Ex 5. Solve the formula for .

  24. Ex 6.Solve the formula for .

  25. Ex 7. Solve the formula for .

More Related