Question

please answer to the question please its urgent​

Answer 1

Answer:

Hey

Step-by-step explanation:

Hope it helps you

Keep learning ☺️

Answer 2

Answer:

Hope it helps... :)

Step-by-step explanation:

Let the factor be 'y'

(5/7)^-2 x y = (15/28)^-1

(7/5)^2 x y = (28/15)^1                     Because, a^-m = (1/a)^m

7^2/5^2 x y = 28/15

49x/25 = 28/15

x = 28/15 x 25/49

x = 20/21

Hence, (5/7)^-2 should be multiplied by 20/21 to get  (15/28)^-1