1 / 7

Learn to write expressions for tables and sequences .

Learn to write expressions for tables and sequences. Additional Example 1: Writing an Expression. Write an expression for the missing value in the table. Rusty’s age is Spike’s age plus 4. Spike’s Age. Rusty’s Age. 2 + 4 = 6. 2. 6. 3. 7. 3 + 4 = 7. 4 + 4 = 8. 4. 8. a.

lfarrar
Download Presentation

Learn to write expressions for tables and sequences .

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. Learn to write expressions for tables and sequences.

  2. Additional Example 1: Writing an Expression Write an expression for the missing value in the table. Rusty’s age is Spike’s age plus 4. Spike’s Age Rusty’s Age 2 + 4 = 6 2 6 3 7 3 + 4 = 7 4 + 4 = 8 4 8 a a + 4 a + 4 When Spike’s age is a, Rusty’s age is a + 4.

  3. Check It Out: Example 1 Write an expression for the missing value in the table. Ty’s Age Rich’s Age Rich’s age is Ty’s age times 7. 1  7 = 7 1 7 2 14 2  7 = 14 3  7 = 21 3 21 a a 7 a  7 When Ty’s age is a, Rich’s age is a 7 or 7a.

  4. Additional Example 2: Writing an Expression for a Sequence Write an expression for the sequence in the table. Look for a relationship between the positions and the values of the terms in the sequence. Use guess and check. Guess 7nGuess 3n + 4 Check by substituting 2. Check by substituting 2. 7 • 2 does not equal 10. 3 • 2 + 4 = 10. The expression 3n + 4 works for the entire sequence. 3 • 1 + 4 = 7, 3 • 2 + 4 = 10, 3 • 3 + 4 = 13, 3 • 4 + 4 = 16 The expression for the sequence is 3n + 4.

  5. Check It Out: Example 2 Write an expression for the sequence in the table. Look for a relationship between the positions and the values of the terms in the sequence. Use guess and check. Guess 7nGuess 5n + 2 Check by substituting 2. Check by substituting 2. 7 • 2 does not equal 12. 5 • 2 + 2 = 12. The expression 5n + 2 works for the entire sequence. 5 • 1 + 2 = 7, 5 • 2 + 2 = 12, 5 • 3 + 2 = 17, 5 • 4 + 2 = 22 The expression for the sequence is 5n + 2.

  6. In each row of the table, the area is half the product of the base and the height. The expression is or 3h. 6h __ 2 Additional Example 3: Writing an Expressions for the Area of a Figure A triangle has a base of 6 inches. The table shows the area of the triangle for different heights. Write an expression that can be used to find the area of the triangle when its height is h inches. 6 • 1 = 6, 6 ÷ 2 = 3 6 • 2 = 12, 12 ÷ 2 = 6 6 • 4 = 18, 18 ÷ 2 = 9 3h

  7. In each row of the table, the area is half the product of the base and the height. The expression is or 2h. 4h __ 2 Check It Out: Example 3 A triangle has a base of 4 inches. The table shows the area of the triangle for different heights. Write an expression that can be used to find the area of the triangle when its height is h inches. 4 • 3 = 12, 12 ÷ 2 = 6 4 • 4 = 16, 16 ÷ 2 = 8 4 • 5 = 20, 20 ÷ 2 = 10 2h

More Related