math
posted by Bradley .
How do I solve:
6x+4y>=80
6x+4y<=170

no solutions, or empty set
solve both equations for y:
y >= 1.5x + 20
y <= 1.5x + 42.5
Same slope with different yintercepts indicates parallel lines;
Graph both, which shows the solution set: solutions for 1st equation are above the line, and solutions for 2nd equation are below the line, which means no point(s) of commonality.