Question

How do you find 4x − 2y if x = −1 and y = −4?

Answer 1

4

Explanation:

substitute the values into the expression.

`4x - 2y = 4 xx (-1) - 2 xx (-4) = - 4 + 8 = 4`

Answer 2

If we start with `4x-2y`, we just replace the `x` with `-1` and `y` with `4`, the expression becomes `4(-1)-2(-4)`. `4*-1` becomes `color(white()` `-4`, and `-2*-4` becomes 8. Together, `4(-1)-2(-4)` simplifies to `-4+8`, which equals `4`.