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HW quadratic formula work how

Started by OttOmaNS · 05/04/2010 · 07:51 AM · 22 replies · 1 read

O OttOmaNSOP

OP 05/04/2010 · 07:51 AM #1

Quadratic real world problems
by maaz224 » Sun Apr 04, 2010 4:46 pm

Yeh its my homework more like take home test.. but i honostly dont know how to solve this.. and Its worth a test grade.. couldnt find anything in my textbook my teacher is a lunatic can someone help me with this ? Just solve this equatioon ill use it to model my other equations and it will be great help.. or guidence will work too.. just guide me through

MSN works too lol

Maximum profit
what ticket price(s)
would generate a profit of $5424
equation p(x)=-16x^2+800x-4000

usage of quadratic formula just dont know how i know how to use it i get the zeros of 5.635 and 44.364 but how is that generating a profit of 5424 ?
How can i find the ticket price that gives me a total profit of 5424 ? Someone help me

C Conquers

05/04/2010 · 09:08 AM #3

this no big problem once you have the formula ;)

for any quadratic equation:( ax^2+bx+c) you can use the quadratic formula to solve for the zeros: X= (the opposite of b plus or minus the square root of b^2 -4ac) all divided by 2a

it looks like this: http://www.gregfolkert.net/pics/funneh/Quadratic_Formula.gif

for this equation:
a=16
b=800
c= -4000

and the answer is 4.58 or -54.58, but since ticket prices can`t be negative the only answer is 4.58

O OttOmaNSOP

05/04/2010 · 08:09 AM #2

the equation equals the profit.. the x is the ticket price.. what ticket price would give me a total of 5424 dolalrs

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