# Please help! [closed]

11x+15y+23=0, 7x-2y-20=0 I tried,

11x+15y+23=0------1 7x-2y-20=0-----------2

11x+15y=-23 =>y=-23x-11x/15 (substituting the value of y in eq 2)

11x+15(-23x-11x/15)=20

Please help! [closed]

11x+15y+23=0, 7x-2y-20=0 I tried,

11x+15y+23=0------1 7x-2y-20=0-----------2

11x+15y=-23 =>y=-23x-11x/15 (substituting the value of y in eq 2)

11x+15(-23x-11x/15)=20

close date 2014-07-18 20:23:14.633861

add a comment

0

var("x y")
solve( [11*x+15*y+23 ==0, 7*x-2*y-20 == 0], [x,y] )

- Ch 1, Sec 2 "Intersecting Two Lines, Part One"
- Ch 1, Sec 3 "Intersecting Two Lines, Part Two"

- Go to www.gregorybard.com
- Click on "Finite Math" on the left hand side of the page
- Each section is its own pdf file.

Asked: **
2014-07-18 14:35:35 -0500
**

Seen: **294 times**

Last updated: **Jul 18 '14**

Please help me write a function that receives a set and then gives all its subsets

Is there a more elegant way to make an interactive worksheet for students?

curves in a plane, find intersecting points?

How to find all subsets of a set without using the pre-defined funtions?

Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.