Thursday

October 2, 2014

October 2, 2014

Posted by **L.Bianchessi** on Friday, March 9, 2012 at 7:45pm.

I used distAnce formula and got

D= (square root 5x^2 -4x +4)

I did....

D=square root (2-x)^2 + (-1-(2x-1))^2

What do I do now?

- precalc!!!!! -
**Reiny**, Friday, March 9, 2012 at 9:07pmThe point would be the intersection of y = 2x-1 with the perpendicular to that line passing through (2,-1)

slope of y = 2x-1 is 2

so the slope of the perpendicuar is -1/2

and the perpendicular is

y = (-1/2)x + b, with (2,-1) on it

so -1 = (-1/2)(2) + b

b =0

so intersect y = 2x-1 with y = (-1/2)x

2x - 1 = (-1/2)x

4x - 2 = -x

5x = 2

x = 2/5

then y = (-1/2)(2/5) = -1/5

the point is (2/5 , -1/5)

**Answer this Question**

**Related Questions**

7th grade math Ms. Sue please - 2. Shelly sews a blanket that has an area of 170...

Math - 1. Rosa, Roberto, Andrea, and Inno find an estimate for square root 10. ...

Algebra II - If the distance from the point (5,k) to the line 8x - 15y + 8 + 0 ...

calculus - Consider line segments which are tangent to a point on the right half...

Geometry - Martin wants to use coordinate geometry to prove that the opposite ...

Math - Using the distance formula I have to prove that ABC are colinear. A(-1, -...

Algebra - Use the quadratic formula to solve the equation. Give exact answers: ...

math - 4. Point E is located at (–2, 2) and point F is located at (4, –6). What ...

math - 4. Point E is located at (–2, 2) and point F is located at (4, –6). What ...

math - 4. Point E is located at (–2, 2) and point F is located at (4, –6). What ...