Need help with a lil 11th grade problem plz.

[RecklaZ]

Find the equation of a line having the same x intercept 4x+3y=0 and parallel to 5x+4y-1=0

Thanks

 

[jacklutz]

I think it was assigned to you for a reason.

 

[Viper GTS]

The x-intercept of 4x + 3y = 0 is at x=0, & for the line to be parallel to 5x+4y-1=0 the slope has to be the same but you need to have a horizontal phase shift.

Find the intercept of your second equation, & do whatever it takes to shift the equation to it's new home passing through x=0.

As always, no guarantees as to the accuracy.



Viper GTS

 

[MisterPants]

y=-5/4x

Might want to do your own HW, as if you didn't know this I doubt you'd pass the test. I'm a stout opponent of homework grading or grades based on homework completion, but knowing the material is key.

put it in slope-intercept form to find slope. m is the slope

y=mx+b

to find x intercept, put it in standard form.

Ax+Bx=C.
However, C is 0, so I put it in slope-intercept.

y=-4/3x.

Y-int is 0, slope is 4/3. If either intercept is 0, the other must also be 0.

For convenience, if C is 0, you can assume the point passes through origin (0,0). Just wanted to illustrate this point.

Parallel lines have the same slope.

Thus, all the equation needs is a slope, in SI form, since it passes through origin. Would be y=-5/4x

 

[Logix]

<<Find the equation of a line having the same x intercept 4x+3y=0 and parallel to 5x+4y-1=0>>

Dude, this is 11th grade material??? You should be doing your own homework. Here are some hints to get you started.

For the first equation, you can find the X-intercept by setting y=0.

For the second equation, rearrange it into y=mx+b form to get the slope, m, and then the parallel line to that will have the SAME SLOPE.

EDIT: I'm a moron, I was thinking perpendicular, which is negative inverse.

/me needs more sleep.

 

[A5]

<< and then the parallel line to that will be the negative inverse slope or, -1/m. >>


Parallel lines have the same slope

 

[Logix]

Thanks, A5. I've editted my post to reflect the real world.

/me concocts story: "I was doing that thing where you know the person next to you is copying off your test, so you purposely fill in the wrong answer to throw 'em off..."

 

[Shadowfire]

WOW!
Jeez, thats like 10th grade stuff...
I on freakin Polinomial Equations, and parabolas, and synthetic division and all... <-- PreCalc in 11th garde...
But line equations...?!

 

[duragezic]

Wtf I don't know any of that stuff.

Got an A (by .1%!) in Precalc this quarter though. Woo thank you AT for the help on those couple bonus problems because if I would've had ONE less bonus problem in I would get a damn A- and then no 4.0.