SOLUTION: 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.

Question 85815: 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.
Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
Basic formula: P(x)= -x/2+75
Substitute each value of "x" into the basic formula and solve.
.
P(2)= -(2)/2+75
P(2)=-1+75
P(2)=74
.
P(7) -(7)/2+75
P(7)=-7/2+75/1
P(7)=-7/2+(75/1)(2/2) [find the lowest common denominatro (LCD)]
P(7)=-7/2+150/2
P(7)=143/2 = 71.5
.
P(9)= -(9)/2+75
P(9)= -9/2+ (75/1)(2/2)
P(9)= -9/2+ 150/2
P(9)= 141/2=70.5

.
P(11) = -(11)/2+75
P(11) =-11/2+ (75/1)(2/2)
P(11)=-11/2+150/2
P(11)=139/2=69.5

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