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Mumz [18]
3 years ago
7

Someone help with this, please. It's for my test ;(

Mathematics
1 answer:
Gnom [1K]3 years ago
8 0

Answer:

y=4

Step-by-step explanation:

90 - 66 = 24

therefore, 8y-8 = 24

8y = 32

divide both sides by 8

y = 4

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Answer:

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A pharmacist wants to make 36ml of a 65% hydrogen peroxide solution. how many pls of 75% hydrogen peroxide must he mix with 57%
faltersainse [42]

Answer:

16 mls of the 75% solution and 20 mls of the 0.57% solution.

Step-by-step explanation:

Set up a system of equations:

Let x = volume of 75% solution and y be volume of 57% solution

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From equation (2):

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Substituting this into equation(1):

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8 0
3 years ago
Solve for a 1/2 a-9=11
Dmitry [639]

Answer:

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