372,639 views
39 votes
39 votes
Help please i dont know how to do this

Help please i dont know how to do this-example-1
User Sydlawrence
by
3.3k points

1 Answer

25 votes
25 votes

Answer:

see attached

Explanation:

The graph is drawn by locating the boundary line, and identifying the shaded area.

Boundary line

For this problem, the easiest way to graph the equation is to consider the x- and y-intercepts.

The x-intercept is found by solving the equality for x when y=0.

25x = 1000 ⇒ x = 1000/25 = 40

The y-intercept is found by solving the equality for y when x=0.

200y = 1000 ⇒ y = 1000/200 = 5

The inequality symbol (≥) includes the "or equal to" case, so the line is part of the solution set. It is drawn as a solid line.

Plot the points (0, 5) and (40, 0) and draw a solid line between them.

Shading

Considering the variables in relation to the inequality symbol, we have ...

x ≥ ( )

y ≥ ( )

This means the shading will be to the right (where x-values are greater) and above (where y-values are greater) the boundary line.

Note that both x- and y-coefficients are positive. For this sort of analysis, we need to choose a variable with a positive coefficient, or rewrite the inequality so that at least one variable has a positive coefficient.

Per the problem statement, the graph includes first-quadrant values only.

Help please i dont know how to do this-example-1
User Pawel Gorczynski
by
3.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.