Question

Alejandro made an error in the steps below when determining the equation of the line that is perpendicular to the line 4x – 3y = –8 and passes through the point (3, –2).
Alejandro made his first error in which step?

A Step 1
B Step 2
C Step 3
D Step 4

Answer 1

https://media.education2020.com/evresources/3109/3109-13/3109-13-03/3109-13-03-assessment/3109-13-03-16.png

Answer 2

Your thoughts?

If the slope of a given line is m, what is the slope of a line perpendicular to the given line?

Answer 3

If you try the first step do you get what they get?

Answer 4

Do you know what per circular slope means?

Answer 5

Perpendicular

Answer 6

now i do

Answer 7

but i dont know what it means by this problem?

Answer 8

should we go through each step until we get to the right answer? Than you'll be able to understand

Answer 9

yeah

Answer 10

Okay so you have the equation 4x-3y=8 in these problems you need to solve for y= so what would you do first?

Answer 11

plug the 3 in for y

Answer 12

Nope move the x part on the other side

Answer 13

let me get a paper

Answer 14

ok

Answer 15

okay let me know when your ready

Answer 16

im ready

Answer 17

4x-3y=8 like I said you want to get the y's alone on one side so first your going to have to get the x's on the other side do you know how to do that?

Answer 18

subtract 4 to 8

Answer 19

4x don't forget about the x but yes that is the right away so you will have?

Answer 20

*idea

Answer 21

Do you understand?

Answer 22

umm no

Answer 23

u mean on the 4x

Answer 24

because i got that figured out

Answer 25

Yes so we're not just subtracting 4 it's 4x is all, so what do you have?

Answer 26

the 3y left

Answer 27

Yes so how would you get rid of the 3 but not the y?

Answer 28

-3

Answer 29

Because we want y=stuff

Answer 30

-3y

Answer 31

Divide? Subtract?

Answer 32

divide?

Answer 33

Yes but not -3 because your have a positive 3 3/3=1 so than you would have 1y or just y left :)

Answer 34

oh ok

Answer 35

So what did you get for the full equation

Answer 36

Y=?

Answer 37

+3y

Answer 38

im getting confused on the y kind of.

Answer 39

Nope we got ride of the 3y because we divided it so so had 4x-3y=8 so we would have subtracted 4x so we have -3y=-4x+8 so yes I'm sorry divide by -3 I thought it was positive 3y so divide by 3 you get y=?

Answer 40

Divide by -3

Answer 41

-1

Answer 42

Divide everything by -3 whatever you do to one side you do to the other

Answer 43

So -3y/-3 -3/-3y=1y which is y now do that to the other parts

Answer 44

*-3y/-3

Answer 45

If I understand this problem statement correctly, you do NOT have to find the equation of a line perpendicular to the given line.

Instead, you are to read through the list of steps taken by this guy Alejandro and identify the step in which he made his FIRST error. That's all.

I asked you before: If the slope of the given line is 4/3, then what is the slope of a line perpendicular to the given line? Could you answer this now, please?

Answer 46

He wanted to go through the steps

Answer 47

Please let @Helpplzze speak for himself.

Answer 48

Ummmm that's what he said

Answer 49

Please let @Helpplzze speak for himself.

Answer 50

do you understand @Helpplzze

Answer 51

The key issue in this whole problem is WHAT WOULD BE THE SLOPE OF A LINE PERPENDICULAR TO THE GIVEN LINE?

Answer 52

Yes math ale we understand that but he wanted to go through the steps until we found the wrong answer, there's no reason to fight over this it will just give this person more practice anyway

Answer 53

My concern is that @Helpplzze is not involved in this discussion at all, and you (kayders1997) continue to speak for him. Kindly wind up your discussion. One last time: the key issue here is

Answer 54

what is the slope of a line perpendicular to the given line?

Until @Helpplzze has answered that correctly, all the rest of your discussion is pointless.

Answer 55

ummmm really?

Answer 56

Sorry to bring this up, but @helpplzze has spoken for himself: "Helpplzze Best Response Medals 0
im getting confused on the y kind of."

Yes, pointless.

Answer 57

It does say step one could be wrong

Answer 58

And I am suggesting that the way to identify that step is to determine the correct slope of a line perpendicular to the given line.

Answer 59

Note that our student is now offline.

Answer 60

Yeah