Question

The product of a number and -7/10 is 1/2 what is the number-7/207/20-5/75/7

Answer 1

Given data:

The product of a nummber and -7/10 is 1/2.

The given expression can be written as,

`\begin{gathered} ((-7)/(10))(a)=(1)/(2) \\ a=-(10)/(14) \\ =-(5)/(7) \end{gathered}`

Thus, the first unknown number is -5/7, so third option is correct.