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Amaiya purchased a box of 36 pencils to donate to Ms. Annunziata’s class, but not all pencils were used. The ratio of pencils that were used to the pencils that did not use is 7 to 5. How many pencils were left from the box of pencils Amaiya bought?

Respuesta :

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15 pencils were left from the box of pencils Amaiya bought.

Step-by-step explanation:

Number of pencils in box = 36

Ratio of used pencils to not used = 7:5

Let,

7x be the total pencils used.

5x be the total pencils not used.

Therefore,

7x+5x=36

[tex]12x=36[/tex]

Dividing both sides by 12;

[tex]\frac{12x}{12}=\frac{36}{12}\\x=3[/tex]

Therefore,

Used pencils = 7x = 7*3 = 21

Not used pencils = 5x = 5*3 = 15

15 pencils were left from the box of pencils Amaiya bought.

Keywords: ratio, multiplication

Learn more about ratios at:

  • brainly.com/question/4706270
  • brainly.com/question/4710621

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