SOLUTION: Sally has a recipe that calls for horseradish sauce that is 50% pure horseradish. at the grocery store she finds one horseradish sauce that is 10% pure horseradish and another that

Question 901362: Sally has a recipe that calls for horseradish sauce that is 50% pure horseradish. at the grocery store she finds one horseradish sauce that is 10% pure horseradish and another that is 60% pure horseradish. how many teaspoons of each horseradish sauces should sally mix together to get 4 teaspoons of horseradish sauce that is 50% pure horseradish?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
a+b=4,
0.1*a+0.6*b=0.5*4
a=4-b
0.1*(4-b)+0.6*b=2
0.4-0.1b+0.6*b=2
0.5*b=1.6
b=3.2
a=4-b
a=0.8 tsp at 10% b=3.2 tsp at 60%
check
0.1*0.8+0.6*3.2=0.5*4
0.08+1.92=2
2.0=2
ok

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