BCC Intermediate Algebra Linear Equations Discussion

How can you tell if a system of linear equation has one solution, or no solution?

Give an example of a system of linear equations with one solution, with infinitely many solutions, and with no solution (must give three examples).

1. What is the difference in graphing linear inequalities for “greater than (>)” symbol and “greater than or equal to  ( ? ) ” symbol? 

Reply to at least two classmates’ posts providing substantive/elaborative feedback

1. ————————————————-student post——-

Shannon, 

1. Good morning Professor and esteemed classmates this is how i understand the question : How can you tell if a system of linear equations has one solution or not solution: by using the solving systems by graphing 

In consistent systems there is at least one solution 

independent systems consist of unique lines 

there are three cases such as 

a( consistent and independent (X,Y)

b.) inconsistent and independent: no solution 

c:) consistent and independent: no solution

1. an example of a system of linear equations with one solution is as follows  4 x ? 2 y = 6 x = 1 2 y + 3 2 o n e s o l u t i o n 

an example of a n equation with infinitely many solutions is as follows:4 ( 1 2 ) y + ( 3 2 ) ? 2 y = 6 2 y + 6 ? 2 y = 6 6 = 6 i n f i n i t e l y m a n y s o l u t i o n s 

an example of a equation with no solution is as follows:

———————————————————student post———

Virginia, 

How can you tell if a system of linear equation has one solution, or no solution? ( 5 points)  

Usually a system of linear equations has a single solution. Although when both equations have the similar slope and do not have the same y-intercept but are parallel to each other with no intersections means there is no solution. When both equations have unlike slopes, then the y-intercept doesn’t matter because they’ll cross for certain, so this means that there is one solution.

Give an example of a system of linear equations with one solution, with infinitely many solutions, and with no solution (must give three examples). (7 points) 

System of linear equations with one solution: x = 3

with infinitely many solutions: y = x + 1

with no solution: x + y =1 & x + y = 2

What is the difference in graphing linear inequalities for “greater than (>)” symbol and “greater than or equal to (?) ” symbol? 

The difference in graphing linear inequalities for “greater than (>)” symbol is if we see a strict inequality we don’t let the boundary line as part of the solution, and this is strictly for less “<” or “>”, but if we do see a non-strict inequality, then the boundary line will be part of the solution and this is in part with the less than or equal to “(?)” or greater to “(?)”.