SOLUTION: the juniors are having a car wash in order to raise money for prom. They are going to charge $5 for small vehicles (x) and $7 for large vehicles (y). write and graph an inequality

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: the juniors are having a car wash in order to raise money for prom. They are going to charge $5 for small vehicles (x) and $7 for large vehicles (y). write and graph an inequality       Log On


   

Question 1047037: the juniors are having a car wash in order to raise money for prom. They are going to charge $5 for small vehicles (x) and $7 for large vehicles (y). write and graph an inequality if they want to make at least $300
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
5x+7y>=300 is the inequality
In slope intercept form,
7y>=-4x+300
y>=(-4/7)x+300/7
To find which side of the line is the inequality valid, use the origin (0,0)
0 >300/7 not true, so whatever contains the origin is not part of the inequality you want.
graph%28300%2C300%2C-10%2C80%2C-10%2C50%2C%28-4x%2F7%29%2B%28300%2F7%29%29
The part of the graph you want is above and to the right of the line, which is solid, because it is > or =