age problems.notebook
December 12, 2011
warm up
www.khanacademy.org
1.
Al's father is 45. He is 15 years older than twice Al's age. How old is Al?
http://www.khanacademy.org/video/age­word­problems­1?playlist=Algebra
http://www.khanacademy.org/video/age­word­problems­2?playlist=Algebra
Margaret’s age is 8 years less than 4 times Theresa’s age. 2.
The sum of their ages 72. Find each of their ages.
Dec 9­10:06 AM
Example 6: Daniel is 4 times as old as Nadia. Nine years ago, Daniel was 7 times as old as Nadia. How old is Nadia now?
Age now
http://www.khanacademy.org/video/age­word­problems­3?playlist=Algebra
Dec 9­10:07 AM
1. Tiffany is 12 years older than Stephanie. Nineteen years ago, Tiffany was 3 times as old as Stephanie. How old is Stephanie now?
Age 9 years ago
Daniel
Nadia
Equation: __________________________________________
Solve. Dec 9­10:07 AM
2. In 57 years, Jessica will be 4 times as old as she is right now. How old is she right now?
Dec 9­10:07 AM
Dec 9­10:07 AM
3. Daniel is 3 times as old as Jessica and is also 16 years older than Jessica. How old is Jessica?
Dec 9­10:15 AM
1
age problems.notebook
4. In 38 years, Gabriela will be 3 times as old as she is right now.
How old is she right now?
Dec 9­10:16 AM
6. Gabriela is 4 times as old as William and is also 15 years older than William. How old is Gabriela?
Dec 9­10:17 AM
December 12, 2011
5. Gabriela is 28 years younger than Michael. Seven years ago, Michael was 5 times as old as Gabriela. How old is Michael now?
Dec 9­10:16 AM
7. Luis is 54 years old and Gabriela is 6 years old. How many years will it take until Luis is only 4 times as old as Gabriela?
Dec 9­10:18 AM
8. Michael is 18 years old and Omar is 2 years old. How many years will it take until Michael is only 3 times as old as Omar?
9. Kevin is 2 times as old as Tiffany. Twenty­five years ago, Kevin was 7 times as old as Tiffany. How old is Kevin now?
Dec 9­10:18 AM
Dec 9­10:18 AM
2
age problems.notebook
10. Lucy is 4 times as old as Amy. Three years ago, Lucy was 13 times as old as Amy.
How old is Lucy now?
Dec 9­10:18 AM
December 12, 2011
11. In 18 years, Jenny will be three times as old as she is now. How old is she?
Dec 9­10:18 AM
12. Dustin is 11 years younger than Elias. In two years, Dustin will be half as old as Elias. How old is Dustin?
13. In 20 years, John will be 5 times as old as he is now. How old is he?
Dec 9­10:18 AM
14. Kim is 3 times as old as she was 2 years ago. How old is she?
Dec 9­10:18 AM
Dec 9­10:18 AM
15. Jeff is two years younger than Carrie. 12 years ago, Carrie was twice as old as Jeff. How old is Jeff now?
Dec 9­10:18 AM
3
age problems.notebook
16. Steve is twice as old as Sylvie. Sylvie is three years older than Jacob. 4 years ago, Sylvie was twice Jacob’s age. How old is Sylvie?
December 12, 2011
17. Cary is 9 years older than Dan. In 7 years, the sum of their ages will equal 93. Find both of their ages now.
Dec 9­10:18 AM
Dec 9­10:18 AM
18. Fred is 4 times as old as his niece, Selma. Ten years from now, he will be twice as old as she will be. How old is each now?
19. An eagle is 4 times as old as a falcon. Three years ago, the eagle was 7 times as old as the falcon. Find the present age of each bird.
Dec 9­10:18 AM
Dec 9­10:18 AM
20. Brenda is 4 years older than Walter, and Carol is twice as old as Brenda. Three years ago, the sum of their ages was 35. How old is each now?
Dec 12­9:44 AM
Dec 12­12:43 PM
4