Question

What is the value of the expression
-1s/20r if r= -1/4 and s= 4/5?
Simplify your answer.​

Answer 1

`(4)/(25)`

Explanation:

Given expression:

`-(1s )/(20r)`

r =
`-(1)/(4)` , s =
`(4)/(5)`

Now;

`-(1s )/(20r)` =
`-(s)/(20r)`

Insert the parameters:

=
`-((4)/(5) )/(20 x (-(1)/(4) ))`

= -
`((4)/(5) )/(-5)`

-x - = +

=
`(4)/(5)` x
`(1)/(5)`

=
`(4)/(25)`