Recent content by literacola

Can I get a hint?

Cool, thanks! So what's the next step? Not sure where to go from here...

Homework Statement For which value of alpha does the following system of linear equations have a solution? x + y = 2 x +αy = -1 αx + y = 1 The Attempt at a Solution I put it into a matrix that looks like this: 1 1 | 2 1 α | -1 α 1 | 1 Then I subtracted row1 from...

Why does it become negative at this jump? (\frac{1}{x})'=(x^{-1})'=-x^{-1-1}=-\frac{1}{x^2} Why not \frac{1}{x^2}

Homework Statement Was just wondering how this equation: (k*16*10^(-6))/d^2=(k*16e-6)/(30-d)^2 gets manipulated to produce this result 20(3-d)^2=d^2 d=2 Homework Equations The Attempt at a Solution I've tried manipulating it myself but it ends up with me spiraling off into pages of...

Where does the 1/2 come from in the first equation you've given??

Embarassing question-- Displacement equation Homework Statement Im just trying to understand why the equation for displacement along a line is x= 1/2(v_{0}+v)t. If the other equation for displacement is v*t, where does the 1/2 come from? Homework Equations v*t x= 1/2(v_{0}+v)t...