Algergra
posted by Kay .
I am stumped! I have been working on these problems for the longest time and I can not figure out what I am doing wrong. Some how when I get to the last two steps I mess up, and I am beyond frustrated.
The directions say:
Write an equation of the line containing the given point and perpendicular to the given line.
1. (5,9) 5x=6y+7
2. (3,5) 4x+y=9
3. (3,5) 6x+5y=7
To show you where I am messing up I am going to give you one I have already tried to do, then maybe someone can tell me where I am going wrong. I have a test on this tomorrow and I don't get it at ALL!
(4,6) x+9y=7
y= 1/97/9
Then you use the formula yy1=m(xx1)
so it would be
y6=1/9x+4
Then here is where I am having problems, when I try to multiply the 1/9 by 4 and then add 6 to it, I come up with the wrong answer.
I got y= 1/9x+10/9. The right answer is 1/9x+58/9. The answers all have to be in the formula of y=mx+b
Thanks for your help!

Start here: you have the general equation correct..
y= x/9 7/9
Now you want a line perpendicular to this line, so it has the slope 9 (negative reciprocal of 1/9
So the equation of the perpendicular is
y=9x + b.
Put in the point 4,6
6=9*4+b so b= 30
so the answer is y=9x30. That is the equation of a line perpendicular and through the point 4,6. Your stated right answer is wrong.
One more:
(5,9) 5x=6y+7
y=5/6 x 7/6
so the perpendicular line will be slope 6/5, or
y=6x/5 +b
put in the point (5,9)
9=30/5 + b
or b=3
y=6x/5 + 3 is the equation of the line perpendicular containing the point.
Respond to this Question
Similar Questions

drivers ed
i have been working on this forever...and i cant figure it out...but its on motorcycle safety...and its two words...but it contains aeehhossvy...and ithink its an article of clothing but other than that i have no idea......cause everything … 
pre algebra
How do I figure out problems like 52 = p +(41)? 
physics.
I have tried the problems. the only thing is the difference in names. I have been able to figure out the tendon problem as well as this very question. I am having a hard time doing the other two. It would be nice to get some help. … 
math
Two rational numbers with the sum of 1, product of 6/25 and quotient of 6. ( I have been working on this for a long time but I can't figure it out!) 
Algebra
I am having such a hard time in this class. Hopefully someone here can help me to understand some of what they are trying to teach me. I have a problem here and have been working on it for about an hour now and I can not figure it … 
Algebra 2 Urgent! please Help!
simplfy (10x^26xx^3)+(9x+x^3+5x^2) please show all work and steps i have been working on this problem for 10 minutes and still cant figure out how to do it. 
Algebra
Help pleaseI'm doing something wrong Solve 8x^2 + 6x + 5 = 0 I'm doing square roots and all the steps but it's not working out I come up with 0.38 + 0.5 and 0.38  0.5 But it's not right when I go to put it back in. Could you please … 
Algebra
Help! I am stumped on this one. Graph the equation 15x + 5y = 10 Thanks! I have been working on these practice problems for two hours and cannot figure this one out 
math
which ordered pair is a solution to the equation y = 3x + 4. I just can't figure it out. I have been working on this problem for over an hour. Please help me with the steps 
Statistics
I am confused by the following and need some help You want to find the values for the equation ŷi=a+bxi. What is the value of the slope?