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Please help, if you can use explanations would be much better

Consuela is a photographer and must mix a chemical in the ratio of chemical:water = 1:9. If she uses 15 fl oz of water in the mixture, how many fl oz of the chemical should she use

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s1m1

Answer:

x= 15/9 fl oz

Step-by-step explanation:

 write the such that chemicals are on one side of : and water on the other

   chemical : water

                 1 : 9

x chemical : 15 of water

now we know that

x/1 = 15/9  cross multiply to find x

x= 1*15/9 = 15/9  ≈ 1.67 fl oz

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