Question

#10: A Caterer’s total cost for a party includes a fixed cost, in addition the caterer also charges a certain amount for. Each guest

$300 to serve 25 guests
$420 to serve 40 guests
Find the fixed cost and the cost per guest

Answer 1

F+25X=300
F+40X=420 SUBTRACT.
-----------------
-15X=-120
X=-120/-15
X=$8 PER GUEST.
F+25*8=300

F+200=300
F=300-200
F=$100 IS THE FIXED COST.
PROOF:
100+40*8=420
100+320=420
420=420