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Ira Lisetskai [31]
3 years ago
12

Choose the correct proportions.

Mathematics
1 answer:
kati45 [8]3 years ago
5 0

Answer:

b) 5:7 = 15:21

Step-by-step explanation:

This questions tests our understanding of enlargement ratios.

#Determine the decimal equivalents or simplify to see which one is correct:

#a) 5:21 = 7:15

\frac{5}{7}=0.7143\\\\\frac{7}{15}=0.4667\\\\5:7\neq 7:15

#b) 5:7 = 15:21

=\frac{5}{7}\\\\=\frac{15}{21}=\frac{5}{7} \# dividing \ by \ 3\\\\\frac{5}{7}=\frac{15}{21}

#c) 5:7 = 21:15

\frac{5}{7}=0.7143\\\\\frac{21}{15}=1.4\\\\\frac{5}{7}\neq \frac{21}{15}

#d) 21:5 = 15:7

\frac{21}{15}=1.4\\\\\frac{15}{7}=2.1429\\\\\frac{21}{15}\neq \frac{15}{7}

Hence, option b is the correct one as 5:7 = 15:21

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