To determine the missing equivalent part-to-part ratios, let's first analyze the numbers given in each row of your table: 7, 10, 70, and 100.
- The ratio of 7 to 10 simplifies to 7:10.
- The ratio of 70 to 100 simplifies to 7:10 (because \(70/10 = 7\) and \(100/10 = 10\)).
We can set up equivalent ratios based on these relationships.
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If we look at the ratio of 7 to 10, we can find equivalent ratios by multiplying both sides by the same value.
For example, multiplying by 2 gives us: \[ 7 \times 2 : 10 \times 2 = 14:20 \]
Therefore, 14:20 is an equivalent ratio to 7:10.
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Now for the ratio of 70 to 100:
If we multiply 70 by 1 and 100 by 1, we essentially keep it the same: \[ 70:100 = 70/10 : 100/10 = 7:10 \] or\( 80 : 56\) can also be derived as it reduces to 14:20 when divided by \(4\).
Now, let's find the options:
- The ratios 20:14 and 80:56 both correspond to the direct multiplication/subtraction from base ratios. However, we can also conclude that:
- \( 14:20 \quad \text{is equivalent to} \quad 7:10\) and gives us \(1:5\) equivalently.
Our final translations are:
- 14:20
- 56:80
So, the answer that includes 14:20 and 56:80 would be the correct choice from the options provided.
Thus, the correct observed relationship between the ratios leads us to this solution:
The answer is: 14:20 and 56:80.