Question

Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2.

Answer 1

To find slope:
\[\frac{ y _{2} - y _{1} }{ x _{2} - x _{1} }\]
Plug in your given values:
\[\frac{ 9 - 5 }{ x - 10 }\]
Simplify:
\[\frac{ 4 }{ x - 10 }\]

And you can solve it for x from there.

Answer 2

X=40?