Problema Solution
Jason is a used-car salesman who sells domestic and foreign cars. He earns $7,000 for each domestic car sold and loses $3,500 for each foreign car sold. Due to certain business commitments, Jason has to sell at least 10 foreign cars each month. He needs to make at least $17,000 each month to cover his expenses. Which graph shows the number of cars he has to sell each month to at least cover his expenses?
Answer provided by our tutors
let
x = the number of domestic cars that Jason sells
y = the number of foreign cars that Jason sells
the total money he will earn has to be at least $17,000
7000x - 3500y >= 17000 divide both sides by 100
70x - 35y <= 170
Jason has to sell at least 10 foreign cars each month:
y >= 10
we need to graph the system of inequalities:
70x - 35y <= 170
y >= 10
click here to see the graph: