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 3 years ago
A school is selling sweaters to raise money. They sell 1200 sweaters when the price is $20. This year they wanna put the price up. A survey tells them that each time they raise they price by $2, they will lose 60 sales. What does the price have to be to get the maximum revenu?
 3 years ago
A school is selling sweaters to raise money. They sell 1200 sweaters when the price is $20. This year they wanna put the price up. A survey tells them that each time they raise they price by $2, they will lose 60 sales. What does the price have to be to get the maximum revenu?

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askme12345
 3 years ago
Best ResponseYou've already chosen the best response.0Okay 1200 * 20 = 24000 lose 60 sales = 1140 * 22 = 25,080 lose 60 more = 1080 * 24 = 25,920 lose 60 more = 1020 * 26 = 26,520 lose 60 more = 960 * 28 = 26,880 lose 60 more = 900 * 30 = 27,000 *GOES DOWN FROM HERE* lose 60 more = 840 * 32 = 26,880 lose 60 more = 780 * 34 = 26520 you see that?

askme12345
 3 years ago
Best ResponseYou've already chosen the best response.0the answer is 900, because after that it starts going down?

robandand
 3 years ago
Best ResponseYou've already chosen the best response.0thank you so much, but were supposed to be able to solve it by f(x) = x^2 + x ... if you know what formula i mean

robandand
 3 years ago
Best ResponseYou've already chosen the best response.0i guess its called completing the square

askme12345
 3 years ago
Best ResponseYou've already chosen the best response.0this should help http://www.purplemath.com/modules/sqrquad.htm

robandand
 3 years ago
Best ResponseYou've already chosen the best response.0Youre supposed to be able to make two equations out of the question, and then substittute one of them into the other but I'm dumb and cant figure out what X is supposed to be.

askme12345
 3 years ago
Best ResponseYou've already chosen the best response.0one equation is price the other sweaters , im assuming? So we have 120060x (since it decreases by 60, x amount of times) *we found out it was 5 times and 2x+20 (since it increases by 2 dollars x times

askme12345
 3 years ago
Best ResponseYou've already chosen the best response.020 is the original price of the sweater

robandand
 3 years ago
Best ResponseYou've already chosen the best response.0youve been a huge help, hopefully grade 11 math is easy enough for you :) thanks for your time
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