Question

the product of two rational number is -3/7.if one of the number is 5/21,find the other​

Answer 1

Answer:

let a be another rational number.

therefore according to condition

a×5/21=-3/7

a=(-3/7)×21/5

a=-9/5

Answer 2

Answer

-9/5

Step-by-step explanation:

to find the other rational number

so let the number be y

a/q

5/21x y = -3/7\

5y/21 =-3/7

canceling 7 and 21

5y/3=-3

now we multiply them with the same value

3x5y/3 = 3(-3)

canceling 3 and 3 in Lhs

5y=3(-3)

5y=-9

y=--9/5

to verify

5/21x-9/5=-3/7

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