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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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atroni [7]

Answer:

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Step-by-step explanation:

Use formula

I=P\cdot r\cdot t,

where

I = interest,

P = principal,

r = rate (as decimal),

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In your case,

t = 1 year,

r = 0.06 (or 6%)

P + I =$12,720, thus

12,720-P=P\cdot 0.06\cdot 1\\ \\12,720-P=0.06P\\ \\12,720=P+0.06P\\ \\1.06P=12,720\\ \\P=\dfrac{12,720}{1.06}\\ \\P=\$12,000\\ \\I=\$12,720-\$12,000=\$720

6 0
3 years ago
What is half of 7 5/8 and 5 3/8
meriva

Answer:

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Step-by-step explanation:

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5 0
2 years ago
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Misha Larkins [42]

When calculating correlation and regression both sets of data must be Statistical.

According to the statement

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so, When calculating correlation and regression both sets of data must be Statistical.

Learn more about DATA here brainly.com/question/13763238

#SPJ4

7 0
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Step-by-step explanation:

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