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I need help with my honors Algebra 2 homework

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2 Answers

F is father's age

D is daughter's age

F = 4D              eq. 1

F + 6 = 3(D + 6) eq. 2

let's substitute eq. 1 into eq. 2

4D + 6 = 3(D + 6)

4D + 6 = 3D + 18

4D - 3D = 18 - 6

D = 12

 

 

8/11/2013 | Ralph L.
In these , so do speak word problems.
   Always choose a variable for unknown, what problem is asking you to find, and then convert English statements of problems to algebraic expression and solve like. here.
 
  D - daughters age
  F=4D  father's age.
  D+ 6 daughter's age after 6 years
  4D + 6= Father's age after 6 years.
 
    Now everything is expressed in terms of one variable D, the equation can be set and solved
 
    4D+ 6 = 3 ( D+6)
  
      4D+6  = 3D +18
       D =12            Daughter's age
       F = 4D = 48   Fathe's age 
9/9/2013 | Parviz F.