SOLUTION: A. Write the equations 8x+5y=120 and 5x-8y=-80 in slope intercept form. B. Determine slope for each equation 8x+5y=120 and 5x-8y=-80 with label. C. Determine algebraically wheth

Algebra ->  Linear-equations -> SOLUTION: A. Write the equations 8x+5y=120 and 5x-8y=-80 in slope intercept form. B. Determine slope for each equation 8x+5y=120 and 5x-8y=-80 with label. C. Determine algebraically wheth      Log On


   

Question 1110141: A. Write the equations 8x+5y=120 and 5x-8y=-80 in slope intercept form. B. Determine slope for each equation 8x+5y=120 and 5x-8y=-80 with label. C. Determine algebraically whether the given pair of lines 8x+5y=120 and 5x-8y=-80 are parallel perpendicular or neither by comparing slopes either algebraically (if perpendicular) or numerically (if parallel or neither)
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
system%288x%2B5y=120%2C+and%2C+5x-8y=-80%29

The slopes are -8%2F5 and 5%2F8.
You can tell by looking at the equations, or if necessary, solving for y in terms of x, and adjust to slope-intercept form.

THIS should tell you something: -%288%2F5%29%2A%285%2F8%29=-1.