SOLUTION: The total question is the following: Graph the inequalities 9x+8y<72 and -7x-4y<=28 to find their solution set. Also, find their point of intersection. I also had to choose a grap

Question 871241: The total question is the following:
Graph the inequalities 9x+8y<72 and -7x-4y<=28 to find their solution set. Also, find their point of intersection. I also had to choose a graphing method for 9x+8y<72. I found the slope to be -9/8 with the y intercept being 0, 9. I then had to find a graphing method for -7x-4y<=28. I found that the slope was -7/4 and the y-intercept was 0,-7. I am unable to find the x and y coordinates of the intersection points.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
You can treat the two inequalities as equations and find that point of intersection.

mult b.s. by 8

23x=
, meaning

Does that point satisfy the inequality system?
9x+8y<72 AND -7x-4y<=28
9(128/23)+8(63/23)<72 AND -7(128/23)-4(63/23)<=28 ?
IF BOTH TRUE, then you include this intersection point; otherwise exclude this point.

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