Question

What is the value of x

Answer 1

We have to find the output of a function, if the input is -7.

The input in this case is the value of x, which is the independent variable.

The output is the value of y, and we will calculate it as:

`\begin{gathered} x=-7 \\ y=√(-7x)+3x \\ y=√(\lbrack-7\cdot(-7)\rbrack+3(-7)) \\ y=√(49)-21 \\ y=7-21 \\ y=-14 \end{gathered}`

If the input is x=-7, the output will be y=-14.

3) We have another function, and the input is x=-7

We evaluate y as:

`y=|(x-6)/(6-x)|=|((-1)(6-x))/(6-x)|=|-1|=1`

The output is y=1 for any input (also x=-7).