shootforthestars
  • shootforthestars
put in slope intercept form 5x-4y=3 passes through (7,-5) put in slope intercept form 2x-5y=9 passes through (2,-9)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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*AR*
  • *AR*
r u trying to get y by itself ?
*AR*
  • *AR*
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shootforthestars
  • shootforthestars
ya, but couldn't figure it out

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shootforthestars
  • shootforthestars
thats not it, because its passing through a point
*AR*
  • *AR*
hold on i can do it
*AR*
  • *AR*
r u trying to fine Find the Perpendicular Line
shootforthestars
  • shootforthestars
no the slope intercept equation
shootforthestars
  • shootforthestars
the answer is y=-4/5x - 19/5 but i do not know how to get to it
Zenmo
  • Zenmo
what did you get for y when plugging in ( 7 , -5)?
Zenmo
  • Zenmo
is that the answer to the first or 2nd problem?
shootforthestars
  • shootforthestars
(-5)=-4/5(7) - 19/5 -5 = -28/5 - 19/5 -5 = -47/5 ?
Zenmo
  • Zenmo
you need help on the first problem right?
shootforthestars
  • shootforthestars
No, it was a problem I had to do in my class, but I got it wrong and I want to know how to solve it
shootforthestars
  • shootforthestars
yup
Zenmo
  • Zenmo
the answer to the first one is wrong, it is supposed to be \[y=\frac{ 5 }{ 4 }x-\frac{ 55 }{ 4 }\]
Zenmo
  • Zenmo
\[5x-4y=3\] \[-4y=3-5x\] \[y=\frac{ 5 }{ 4 }x-\frac{ 3 }{ 4 }\]
Zenmo
  • Zenmo
Looking at y=mx+b (slope intercept form), m = 5/4
Zenmo
  • Zenmo
Plug m into the slope intercept form, \[y=\frac{ 5 }{ 4 }x+b\]
Zenmo
  • Zenmo
\[-5=\frac{ 5 }{ 4 }(7) + b\] Plugging in ( 7, -5) in.
shootforthestars
  • shootforthestars
-55/4?
Zenmo
  • Zenmo
we need to isolate b, so subtract 35/4 to the other side of -5 to get \[-5-\frac{ 35 }{ 4 }=b\]
Zenmo
  • Zenmo
yes and that is b.
Zenmo
  • Zenmo
now, since we found b (b = -55/4) and the slope m ( m=5/4), plug it into the slope-intercept formula to get y=(5/4)x-55/4
shootforthestars
  • shootforthestars
oh ok
Zenmo
  • Zenmo
The purpose of the first part is to find the slope of m. Once you found the slope of m. Use the slope-intercept formula y=mx+b, plug in m, after plug in the given points to find b. Then after all is found, just plug m and b into y=mx+b.
shootforthestars
  • shootforthestars
ok
Zenmo
  • Zenmo
you said the answer was -4/5x-19/5?
shootforthestars
  • shootforthestars
y=5/4x-55/4
shootforthestars
  • shootforthestars
ya thats what my teacher said
Zenmo
  • Zenmo
and that is for the first problem correct?
shootforthestars
  • shootforthestars
yup
Zenmo
  • Zenmo
I think your teacher made a mistake lol
shootforthestars
  • shootforthestars
Well he marked it wrong on my test :(
Zenmo
  • Zenmo
Show your work to another teacher, you are guaranteed to get your points back due to the teacher making a mistake.
shootforthestars
  • shootforthestars
ok, thanks
Zenmo
  • Zenmo
do you need help for the 2nd problem?
shootforthestars
  • shootforthestars
No, I know how to do it now
shootforthestars
  • shootforthestars
Thanks :D
Zenmo
  • Zenmo
okay no problem, be sure to talk to that teacher or to some authority though. Those points taken off is invalid.

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