Saturday

December 20, 2014

December 20, 2014

Posted by **Anonymous** on Monday, September 10, 2012 at 2:11pm.

Please help!

a) find the equatoin of line 1 which passes through (1,3) and (9,7)

I get y=3+1/2(x+1)or y=1/2x+2.5

b) the line 2 is perpedicular to line 1 and passes through 5,0. find the equation

for this one i get y=-2x+10

c) find where line 1 and line 2 intersect each other. use this to compute the distance between the point (5,0) and line 1

I get (-5,0) for the intersection, which doesnt make sense to me?

Thanks

- precalc -
**Steve**, Monday, September 10, 2012 at 3:08pmline 1:

(y-3)/(x-1) = (7-3)/(9-1)

y-3 = 1/2 (x-1)

y = 1/2 x + 5/2

you are correct

line 2:

(y-0) = -2 (x-5)

y = -2x + 10

you are correct

1/2 x + 5/2 = -2x + 10

5/2 x = 15/2

x = 3 so y=4

The lines intersect at (3,4)

d^2 = (3-5)^2 + (4-0)^2

d^2 = 4+16 = 20

d = 2√5

**Answer this Question**

**Related Questions**

Anonymous - Give the exact intersection point for the equations f(x)=4sin^2x+...

Vectors - I am really lost and confused! Consider the lines r = (1,-1,1) + t(3,2...

Geometry - M is the midpoint of LM LM=3x+5 LN=5x+40 Find MN I've tried to work ...

Calc problem - Consider the function y=(kx)/(x-k) a. Show that y is symmetric ...

precalc - f(x)=2+4x-x^2 when x is less than 2 thus f-1(x)=2-sqrt(-x+6) i need to...

Math - Find the intersection point. 3x+2y = 3 2x+10y = -5 I put them into y=mx+b...

Calculus - If f(x)= 1/1-x Find the composition of f(f(x)). So I get 1/1-(1/1-x) ...

12th grade - If f(x)= 1/1-x Find the composition of f(f(x)). So I get 1/1-(1/1-x...

Precalc - 1. Solve log (4x) = log (2) + log (x-1) the fact that this is x-1 and ...

Precalc - At the point were a line intersects a plane [with the equation (24x+...