Question

The product of two rational numbers is -3 by 7 . If one of the number is 5 by 21 , find the other

Answer 1

Answer:

-9/5

Step-by-step explanation:

Answer 2

ANSWER:

• Other rational number = -9/5

GIVEN:

• Product of two rational number = -3/7.
• One rational number = 5/21.

TO FIND:

• Other rational number.

SOLUTION:

Let 'x' be the other rational number.

According to the Question:

$\implies \: x \times \dfrac{5}{21} = \dfrac{ - 3}{7} \\ \\ \implies \: \dfrac{5x}{21} = \dfrac{ - 3}{7} \\ \\ \implies \: 5x = \dfrac{ - 3}{7} \times 21 \\ \\ \implies \: 5x = - 9 \\ \\ \implies \: x = \dfrac{ - 9}{5}$

Other rational number = -9/5

In this way we can solve this problem.