Question 68450
When x number of units are sold, the price of each unit (in dollars) is given by p = -x/2 + 75. Find the unit price when the following quantities are sold: 2,7,9,11.
Let x=2 and solve for p:
{{{p=-(2)/2+75}}}
{{{p=-1+75}}}
{{{p=74}}} 
When 2 units are sold, the unit price is $74.
Let x=7
{{{p=-(7)/2+75}}}
{{{p=-3.5+75}}}
{{{p=71.5}}}
When 7 units are sold, the unit price is $71.50
Let x=9
{{{p=-(9)/2+75}}}
{{{p=-4.5+75}}}
{{{p=70.5}}}
When 9 units are sold, the price is $70.50
Let x=11
{{{p=-11/2+75}}}
{{{p=-5.5+75}}}
{{{p=69.5}}}
When 11 units are sold, the price is $69.50
Happy Calculating!!!