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the cost of 3 pints of ice cream is 7 dollars . what is the proportion used to find the cost ,c, of 9 pints of the same ice cream ?

User Sam Nikzad
by
6.7k points

2 Answers

1 vote

Final answer:

The proportion used to find the cost of 9 pints of ice cream, when 3 pints cost $7, is 3 pints / $7 = 9 pints / c. Cross multiplying and solving for c, we find that c = $21, indicating 9 pints cost $21.

Step-by-step explanation:

The question asks us to find the proportion that can be used to calculate the cost, c, for 9 pints of ice cream, given that the cost of 3 pints is 7 dollars. To do this, we set up a proportion where both ratios compare pints to dollars. We know that 3 pints cost $7, so the ratio is 3 pints to $7. To find the cost of 9 pints, we set up the proportion with an unknown value, c, which represents the cost of 9 pints.

The proportion will therefore be:

3 pints / $7 = 9 pints / c

Next, we cross multiply in order to solve for c:

3 * c = 9 * $7

3c = $63

Now, we divide both sides by 3 to solve for c:

c = $63 / 3

c = $21

Therefore, the cost of 9 pints of ice cream is $21.

User Cabhishek
by
6.8k points
10 votes

Answer:

20.97$

Step-by-step explanation:

7/3=2.33

2.33*9 = 20.97

User Henry Thompson
by
7.1k points