1 / 19

Writing Algebraic Expressions

Be able to write an algebraic expression for a word phrase or write a word phrase for an expression. Writing Algebraic Expressions. Warm Up Evaluate each algebraic expression for the given value of the variables. ) 7 x + 4 for x = 6 2.) 8 y – 22 for y = 9

frieda
Download Presentation

Writing Algebraic Expressions

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. Be able to write an algebraic expression for a word phrase or write a word phrase for an expression. Writing Algebraic Expressions

  2. Warm Up • Evaluate each algebraic expression for the given value of the variables. • ) 7x + 4 for x = 6 • 2.) 8y – 22 for y = 9 • 3.) 12x + for x = 7 and y = 4 • 4.) y + 3z for y = 5 and z = 6 46 50 8 y 86 23

  3. Although they are closely related, a Great Dane weighs about 40 times as much as a Chihuahua. An expression for the weight of the Great Dane could be 40c, where c is the weight of the Chihuahua. When solving real-world problems, you will need to translate words, or verbal expressions, into algebraic expressions.

  4. Notes • In order to translate a word phrase into an algebraic expression, we must first know some key word phrases for the basic operations.

  5. On the back of your notes:

  6. Addition Phrases: • More than • Increase by • Greater than • Add • Total • Plus • Sum

  7. Subtraction Phrases: • Decreased by • Difference between • Take Away • Less • Subtract • Less than* • Subtract from*

  8. Multiplication Phrases: • Product • Times • Multiply • Of • Twice or double • Triple

  9. Division Phrases: • Quotient • Divide • Divided by • Split equally

  10. Notes • Multiplication expressions should be written in side-by-side form, with the number always in front of the variable. • 3a 2t 1.5c 0.4f

  11. Notes • Division expressions should be written using the fraction bar instead of the traditional division sign.

  12. Examples • Addition phrases: • 3 more than x • the sum of 10 and a number c • a number n increased by 4.5

  13. Examples • Subtraction phrases: • a number t decreased by 4 • the difference between 10 and a number y • 6 less than a number z

  14. Examples • Multiplication phrases: • the product of 3 and a number t • twice the number x • 4.2 times a number e

  15. Examples • Division phrases: • the quotient of 25 and a number b • the number y divided by 2 • 2.5 divide g

  16. Examples 12f • converting f feet into inches • a car travels at 75 mph for h hours • the area of a rectangle with a length of 10 and a width of w 75h 10w

  17. Examples i • converting i inches into feet • the cost for tickets if you purchase 5 adult tickets at x dollars each • the cost for tickets if you purchase 3 children’s tickets at y dollars each 12 5x 3y

  18. Examples • the total cost for 5 adult tickets and 3 children’s tickets using the dollar amounts from the previous two problems 5x + 3y = Total Cost

  19. Example The United States House of Representatives has 35 more members than four times the number of members in the United States Senate. Define a variable and write an expression to represent the number of members in the House of Representatives.

More Related