Question

Fill in the missing numbers.
$1. \frac{7}{3} = \frac{?}{9} = \frac{49}{?} = \frac{ - 21}{?}$
$2. \frac{ - 2}{5} = \frac{?}{10} = \frac{6}{?} = \frac{ - 8}{?}$
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Answer 1

Step-by-step explanation:

1) 7/3 = x/9

= x = 7×9/3

= x = 21

now

21/9 = 49/y

y = 9×49/21 = 21

and

49/21 = -21/z

z = 21 (-21)/49

z = -9

2) -2/5 = x/10

-2×10/5 = x

x = -2×2

x = -4

now

-4/10 = 6/y

y = 6×10/-4

y = -15

and

6/-15 = -8/z

z = -(8×15)/6

z = -20