math
posted by Anonymous .
Solve each system of equations by graphing. Check each solution.
The perimeter of a rectangle is 24 ft. Its length is five times its width. Let x be the length and y be the width. What is the area of the rectangle?

make a graph, horizontal width, vertical length.
Plot a line with slope 5 from the origin.
Now, plot the line w=12l
or w=L+12
where the lines cross, is the solution
now, area of triangle: area underneith the triangle drawn from 0.0 to the intersection point