Mathematics: Martin can run 1 mile in 7 minutes. what proportions can be written from this information?

Martin can run 1 mile in 7 minutes. what proportions - id174783600, harleycochran2ovyt3n

Ответ:

Savageboyn

16.01.2022

Mathematics

$\frac{1}{7}=\frac{3}{21}$

$\frac{7}{1}=\frac{21}{3}$

Step-by-step explanation:

Verify each case

case 1) $\frac{1}{7}=\frac{3}{21}$

Multiply in cross and then compare both sides

1*21=7*3

21=21 ----> is true

therefore

Is a valid proportion

case 2) $\frac{1}{21}=\frac{3}{7}$

Multiply in cross and then compare both sides

7*1=21*3

7=63 ----> is not true

therefore

Is not a valid proportion

case 3) $\frac{7}{1}=\frac{3}{21}$

Multiply in cross and then compare both sides

21*7=1*3

147=3 ----> is not true

therefore

Is not a valid proportion

case 4) $\frac{7}{1}=\frac{21}{3}$

Multiply in cross and then compare both sides

3*7=1*21

21=21 ----> is true

therefore

Is a valid proportion

case 5) $\frac{1}{7}=\frac{21}{3}$

Multiply in cross and then compare both sides

3*1=7*21

3=147 ----> is not true

therefore

Is not a valid proportion

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Ответ:

ramenbates81

04.06.2020

Mathematics

There are five different ways, in which we can arrange the photos.

Step-by-step explanation:

There are five different ways to arrange the photos.

1. 5 photos in each 4 rows.

2. 4 photos in each 5 rows.

3. 2 photos in each 10 rows.

4. 10 photos in each 2 rows.

5. 20 photos in a single row.

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Martin can run 1 mile in 7 minutes. what proportions can be written from this information?

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