ah been on dis here site for 2 years and never heard about no medals.
total is 460 at most
x+y≤460
y is at least 4 times of x
y≥4x
ok, so realisitcally, yu can't donate negative amounts
only use first quadrant (use only positive x and y axises)
graph the line y=4x
shade to the right of the line
now graph the line y=-x+460 (yint at y=460)
y≤-x+460, so shade below that
see attached graphh
where the 2 graphs intersect is where the solution is (remember use positive x and y axises)
see other garph for graphed thing
so the equations to graph are
x+y≤460 and
y≥4x