Help how would I do this problem

Question

marcoreus11 · Answer

Here

mathmale · Answer

Start by choosing letters to represent the number of EACH TYPE of vacuum cleaner sold.
The first type sells for $150.  How would you express the revenue if the salesman sells x of these $150 models?

marcoreus11 · Answer

y=150x @mathmale

mathmale · Answer

If the salesman sells x of the $150 vacs, then the revenue from those sales is $150x.
No justification here for involving both x and y as you have done in y=150x.

Now write an expression for the revenue if the salesman sells y units of the other vac.

marcoreus11 · Answer

200y for the other?

mathmale · Answer

Good.  Now you're adding $150x to $200y and writing the inequality 150x+200y "is equal to or greater than $1,800.  Represent this function with a dashed line, due to the "equal to or greater than" symbol.

Review how to graph straight lines.

You could graph this inequality in the Draw utility, below.

marcoreus11 · Answer

150x+200y greater than symbol $1800