7. A hospital supply room only has a 70% hydrogen peroxide solution and a 90% hydro- gen peroxide solution. How many liters of each should be mixed to obtain 50 liters
of a 85% solution? You must set up an equation and solve to receive credit.

12.5 liters of 70% hydrogen peroxide solution and 37.5 liters of 90% hydrogen peroxide solution is required.

Step-by-step explanation:

Let x = Quantity of 70% hydrogen peroxide solution.

y = Quantity of 90% hydrogen peroxide solution.

To obtain: 50 liters of a 85% solution.

x+y =50   (i)   (Total quantity of solution)

0.70x+0.50y=0.85(50)   (Total quantity of  hydrogen peroxide)

⇒ 0.70x+0.50y= 42.5 (ii)

Multiply 0.70 to (i) , we get

Subtract (iii) from (ii), we get

Put value of y in (i) , we get

Hence, 12.5 liters of 70% hydrogen peroxide solution and 37.5 liters of 90% hydrogen peroxide solution is required.

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step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

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step-by-step explanation: