Choose the correct proportions.

21, 5, 15, 7

a) 5:21 = 7:15
b) 5:7 = 15:21
c) 5:7 = 21:15
d) 21:5 = 15:7

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

#b) 5:7 = 15:21

#c) 5:7 = 21:15

#d) 21:5 = 15:7

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

step-by-step explanation:

de-gf

hj=3x+20

ji=15x-64