20 kg of baking flour was made by
combining 15 kg of bleached flour which
costs $7/kg with 5 kg of unbleached flour
which costs $3/kg. Find the cost per kg of
the mixture.

cost per kg of  the mixture is $6 per kg .

Step-by-step explanation:

Here we have , 20 kg of baking flour was made by  combining 15 kg of bleached flour which  costs $7/kg with 5 kg of unbleached flour  which costs $3/kg.We need to find Find the cost per kg of  the mixture. Let's find out:

20 kg of baking flour was made by  combining

Cost of bleached flour is :

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⇒

Cost of unbleached flour is :

⇒

⇒

Hence , total cost of mixture is $105+$15 = $120.

Now ,  cost per kg of  the mixture :

⇒

⇒

⇒

Therefore , cost per kg of  the mixture is $6 per kg .

just sum

10 + 10 = 20