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matrenka [14]
2 years ago
15

PLEASE HELP IM STUCK

Mathematics
1 answer:
Andreyy892 years ago
3 0

Answer:

23

Step-by-step explanation:

The question gives the first equation:

0.05N + 0.10D = 2.20

It can be rewritten as:

0.05$ times the number of nickels plus 0.10$ times the number of dimes is equivalent to $2.20.

Notice that 0.05$ or 5 cents is equivalent to one nickel and 0.10$ or 10 cents is equivalent to one dime.

The question asks for N+D. We know that N stands for the number of nickels Daniel has and D stands for the number of dimes Daniel has. We also know that Daniel <u>only</u> has dimes and nickels in his pocket. Therefore N+D most be equivalent to the <u>total number of coins</u>, which is given in the question to be equal to 23 coins.

Therefore...

N+D = 23

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Explanation:

We can factor the numerator and denominator as;

(

x

−

2

)

(

x

−

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−

1

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We can now cancel common term in the numerator and denominator:

(

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(

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1

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and

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x

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−

3

x

+

2

2

x

2

−

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x

=

x

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2

2

x

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≠

0

and

x

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1

Or

x

2

−

3

x

+

2

2

x

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−

2

x

=

x

2

x

−

2

2

x

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2

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