Register to reply

Max value of x+y (solving a linear system)?

by holezch
Tags: linear, solving
Share this thread:
Apr23-10, 11:15 AM
P: 253
1. The problem statement, all variables and given/known data

A line passes through (3,4). What is the maximum value of x+y?

2. Relevant equations
y = mx + b

3. The attempt at a solution

So I set up a system of equations, m3+b =4; b = Y; mX + b = 0. Then I plugged my values for X and Y into m3+b = 4..
The weird thing is though... there is no maximum value of x+y?? It's just a line, x or y could go out further and further to infinity
How should I solve this? Thanks
Phys.Org News Partner Science news on
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
Apr23-10, 11:48 AM
P: 97
As you say, the only solution that makes sense here is "infinity". Are you sure you have the question right?

Register to reply

Related Discussions
Solving a system of linear equations Calculus & Beyond Homework 2
Help Solving Non-Linear System General Math 2
Solving a system of linear equations Introductory Physics Homework 8
Help solving a system of linear equations Linear & Abstract Algebra 5