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4 years ago

9

Tammy wants to get change for $.30. The only coins she can get are quarters, nickels and dimes. How many different ways can she

get $.30 using only these coins?

1 answer:

Dmitry_Shevchenko [17]4 years ago

8 0

1. One quater and one nicle 2. Three Dimes 3. 6 nickels 4. One dime and four nickles 5. two nickles and two dimes i think

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Olegator [25]

Answer:

Let's solve for f.

4

r

+

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f

=

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Step 1: Multiply both sides by fr.

4f+8r=

5fr

g

Step 2: Multiply both sides by g.

4fg+8gr=5fr

Step 3: Add -5fr to both sides.

4fg+8gr+−5fr=5fr+−5fr

4fg−5fr+8gr=0

Step 4: Add -8gr to both sides.

4fg−5fr+8gr+−8gr=0+−8gr

4fg−5fr=−8gr

Step 5: Factor out variable f.

f(4g−5r)=−8gr

Step 6: Divide both sides by 4g-5r.

f(4g−5r)

4g−5r

=

−8gr

4g−5r

f=

−8gr

4g−5r

Answer:

f=−8gr4g−5r

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