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Tomtit [17]
3 years ago
8

Kat owns 15% more figurines than she did last year. She purchased F figurines this year. Which of the following expressions coul

d represent the number of Figurines Kat owned last year?
Mathematics
2 answers:
nataly862011 [7]3 years ago
8 0

Well please re post the complete question as i can not see the expression over here. How ever, A wild guess is 15% of x + x should be equal to F. Where x is the figurines owned the previous year.

Stella [2.4K]3 years ago
4 0

Answer:  F / 0.15 = 100F / 15 = 20F / 3 ≈ 6.67F.


Explanation:


1) The three expresssions,  F / 0.15;  15 F / 100; 3F / 20; are equivalent.


2) The number of figurines Kat owned last year may be expressed in terms of the number the of figurines purchased, F, this year, and the 15%, following this procedure:


  • Call n the amount of figurines owned last year.
  • F is the number of figurines purchased: F  = 15%n = 0,15n
  • Hence, you just need to clear F from the expression F = 0.15n
  • Divide both sides by 0.15:

        F / 0.15 = n or n = F / 0.15 (reflexive property)

  • To prove the equialavence of the other expresssions you just have to use the properties of multiplication or division:

       (F / 0.15) × (100 / 100) = 100F / 15

        100F / 15 = (100/5)F / (15/5) = 20F / 3 ≈ 6.67F

 



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