A community for students.
Here's the question you clicked on:
 0 viewing
Kailee1423
 one year ago
Use the Distance Formula and the xaxis of the coordinate plane. Show why the distance between two points on a number line (the xaxis) is  a – b , where a and b are the xcoordinates of the points.
Kailee1423
 one year ago
Use the Distance Formula and the xaxis of the coordinate plane. Show why the distance between two points on a number line (the xaxis) is  a – b , where a and b are the xcoordinates of the points.

This Question is Closed

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0@mathlover2014 @Jhannybean

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0@HelloKitty17 @They_Call_Me_Narii @FEARLESS_JOCEY

phi
 one year ago
Best ResponseYou've already chosen the best response.1Do you know the "distance formula" ? Is it in your notes?

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0d=the square root of x2x1^2 + y2y1^2

phi
 one year ago
Best ResponseYou've already chosen the best response.1OS is back. yes that is the correct formula. they want you to use it for two points that lie on the xaxis (that means they y value is 0)

phi
 one year ago
Best ResponseYou've already chosen the best response.1for example, the two points can be (a,0) and (b,0) (if we plot them (if we knew what number a and b were) , they would be on the xaxis any way, use the distance formula to find the distance between those two points. can you try to do that ?

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0I could use the distance formula to find coordinates but this is just explaining without actual coordinates. It's confusing lol

phi
 one year ago
Best ResponseYou've already chosen the best response.1just use letters instead of numbers.

phi
 one year ago
Best ResponseYou've already chosen the best response.1for example x2 is "b" and x1 is "a" use those letters in the formula the y's are easy: both are 0

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0So D=(A^20^2) + (B^20^2) ?

phi
 one year ago
Best ResponseYou've already chosen the best response.1I think you mixed x and y together the formula says \[ D = \sqrt{(x_2x_1)^2 + (y_2y_1)^2}\]

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0Oh so D=(A^2B^2) + (0^20^2)

phi
 one year ago
Best ResponseYou've already chosen the best response.1almost. you don't square each x or y you square the difference. Look at the formula carefully

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0I see now! Lol It's D=(AB) + (00)

Kailee1423
 one year ago
Best ResponseYou've already chosen the best response.0the square root of that

phi
 one year ago
Best ResponseYou've already chosen the best response.1it is \[ D= \sqrt{ (AB)^2 +(00)^2 } \] we can ignore adding zero, so that simplifies to \[ D= \sqrt{ (AB)^2}\]

phi
 one year ago
Best ResponseYou've already chosen the best response.1now we use the definition \[ AB= \sqrt{(AB)^2 }\] so show the distance is \[ D=  AB \]
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.