If you can explain and show me the answers that would be great!

1) B=-12

2) 189.69

Step-by-step explanation:

Explanation 1: To find B, we have to replace the given points in the equation, that is , x=2 and y=1

Then we solve for B.

Hence , B=-12

explanation 2: you have the following equation for the number of liters 3% milk:

Solve the previous equation for x:

Hence , there are 10.31 liters of 3% milk  

Add the numbers of liters 10% butterfat is :

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answer: for each 3 girls there is 2 boys . 3: 2

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