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in a certain​ chemical, the ratio of zinc to copper is 3 to 13. a jar of the chemical contains 403 grams of copper. how many grams of zinc does it​ contain?

HELP MEHH PLZZZ!!!!!!!!!!!!!

Respuesta :

tramserran

Answer: 93 grams Zinc


Step-by-step explanation:

3 Zinc : 13 Copper

x 31       x 31            

93 Zinc,     403 Copper

or

set up a proportion, cross multiply, and solve for the variable:

[tex]\frac{Zinc}{Copper}: \frac{3}{13} = \frac{x}{403}[/tex]

3(403) = 13(x)

[tex]\frac{3(403)}{13} = x[/tex]

3(31) = x

93 = x


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