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Olin [163]
2 years ago
12

craig likes to collect records. last year he had 10 records in his collection. now he has 15 records. what is the percent increa

se of his collection?
Mathematics
1 answer:
schepotkina [342]2 years ago
7 0

Answer:

His collection increased in a 20%.

Step-by-step explanation:

If 100% represents 10 records, what percentage would be for 12 records?

x = 12 100% / 10 = 120%

So, if we subtract 120% - 100%, it's gonna result in a difference of 20%, which means that 12 represents a 20% more, or his collection increased in a 20%.

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Make a substitution of <em>v(x)</em> = <em>y(x)</em> - 4<em>x</em> + 6, so that d<em>v</em>/d<em>x</em> = d<em>y</em>/d<em>x</em> - 4. Then the DE becomes

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Get the solution back in terms of <em>y</em> :

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You can go on to solve for <em>y</em> explicitly if you want.

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