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hammer [34]
1 year ago
5

The question is:

Mathematics
1 answer:
Naddik [55]1 year ago
7 0

Answer:

2.5 gallons of the 20% solution must be replaced by the 36% solution.

Step-by-step explanation:

.12(20 - x) + .36x = 20(.15)

2.4 - .12x + .36x = 3

2.4 - .24x = 3

- .24x =  - .6

.24x = .6

x = 2.5

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Orlov [11]

Answer:

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Step-by-step explanation:

Since y is the external angle to x, which you got right, it is in fact, 180-10, = 170 degrees. And since z is the external to our unknown angle, that means it is equal to the sum of the other two angles in the triangle. That means z is 54 + 10, which is 64.

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3 years ago
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ruslelena [56]

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Step-by-step explanation:

the formula of common ratio is given as

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