SOLUTION: 1. A garment store sells about 40 t-shirts per week at a price Php 100 each, 10 decrease in price, the sale lady found out that 5 more t-shirt per week sold. What quadratic funct

Algebra ->  Finance -> SOLUTION: 1. A garment store sells about 40 t-shirts per week at a price Php 100 each, 10 decrease in price, the sale lady found out that 5 more t-shirt per week sold. What quadratic funct      Log On


   

Question 1170855: 1. A garment store sells about 40 t-shirts per week at a price Php 100 each, 10 decrease in price,
the sale lady found out that 5 more t-shirt per week sold. What quadratic function in standard
for the models. The revenue form t-shirts sell. What price produce the maximum revenue?
With solutions:)
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
this is 40+5x shirts sold at a price of 100-10x
the equation is -50x^2+100x+4000=f(x)
the maximum is at x=-b/2a or x=1
the price is 90 Php. and 45 shirts are sold for 4050 Php. revenue
100 and 40 gives 4000 Php.
80 and 50 gives 4000 Php.
90 Php.