Question

How do you evaluate `f(x)=2|-x+3|-9x` for x=-4?

Answer 1

See explanation.

Explanation:

To calculate the value of an expression for a specified value of a variable you substitute the given value for all occurences of the variable and then simplify the expression:

`f(x)=2xx|-x+3|-9x`

So

`f(-4)=2xx|-(-4)+3|-9*(-4)=2xx|4+3|-9*(-4)=`
`=2xx|7|+36=14+36=50`