Question

What is the value of the rational expression below when is equal to 5?

Answer 1

`\boxed {C. -2}`

Explanation:

`\textsf {Substitute x = 5 in the expression :}`

`\longrightarrow \mathsf{(15 - x)/(x - 10)}`

`\longrightarrow \mathsf{(15 - 5)/(5 - 10)}`

`\longrightarrow \mathsf{(10)/(-5)}`

`\longrightarrow \mathsf{-2}`