162k views
21 votes
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
8.1k 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
8.1k points
10 votes

Answer:

20.97$

Step-by-step explanation:

7/3=2.33

2.33*9 = 20.97

User Henry Thompson
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories