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Ray Of Light [21]
3 years ago
11

How many ounces of a 30% alcohol solution must be mixed with 9 ounces of a 35% alcohol solution to make a 31% alcohol solution ?

Mathematics
1 answer:
sleet_krkn [62]3 years ago
6 0

Answer:

  36 ounces

Step-by-step explanation:

Let q represent the quantity of 30% solution required. The total amount of alcohol in the mix is ...

  30%·q + 35%·9 = 31%·(q +9)

  30q + 315 = 31q +279 . . . . multiply by 100 and eliminate parentheses

  36 = q . . . . . add -(279+30q) to both sides

36 ounces of 30% alcohol must be mixed to make the 31% solution.

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A bag of birdseed that normally costs $22.25 is marked up to $25.30 what is the percent markup?
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nadezda [96]

Answer:

73

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I will show my work below. Refer to it if you need to.

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Read 2 more answers
The length of a square is increased by 2 inches. The perimeter of the original square is ten inches more than the length of one
Lapatulllka [165]
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We're going to solve this question using simultaneous equations. This means we need another equation to compare the first one to.
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y = 4 + 2
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