Saturday

April 19, 2014

April 19, 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

**Related Questions**

PreCalc - The monthly revenue achieved by selling x wristwatches is figured to ...

Precalc - Okay for this question I know I am supposed to use the law of sines. ...

Precalc - I dont know if i did this correctly is(x-1) a factor of 17x^10+16x^6+1...

precalc help - cos(15degrees) this is not plugging it in the calculator, please ...

Precalc - Hello, i need help doing a proof, im pretty sure on how to do it but ...

precalc - find the zeros of the function: f(x)=x^3+2x^2-109x-110 I think I need ...

PreCalc - I'm given some sort of curve with these points defined (-pi/2 , -1) ...

precalc - So if f(x) = log subscript 5 x then the value of 125 is -3 and the ...

Precalc - Hello, good afternoon. I need help with my precalc hw. we are learning...

check my precalc - Rewrite each of the following as a product of linear factors ...