You are going to buy doughnuts for your co workers. you buy 2 boxes of glazed doughnuts for $3.99 each 3 boxes of choclate cover doughnuts for $4.49 each and 1 box of cream fillied dougnuts for $4.99 you pay the cashier with a $50 dollar bill. how much change should you recive back

 answer is $27.94
I hope this helps

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.