48. Business and finance. When x number of units are sold, the price of each unit (indollars) is given by p=-x/2+75 . Find the unit price when the following quantitiesare sold: 2, 7, 9, 11
2007-06-24 15:59:03 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Just plug it in:
-2/2 + 75 = 74
-7/2 + 75 = 71.5
-9/2 + 75 = 70.5
-11/2 + 75 = 69.5
2007-06-24 16:06:44 · answer #1 · answered by сhееsеr1 7 · 0⤊ 0⤋
You have to do what we call substitution in algebra. Make a table like this:
Units Price
2
7
9
11
To get each price, make the calculation using the formula that they gave. For units = 2, --> p = -2/2 + 75. Simplify it one step at a time (or use a calculator). p = -1 +75. p = 74. Fill $74.00 in the price column for the first row. Follow the same process for each of the other rows, putting the number of units in place of 'x'.
2007-06-24 23:08:21 · answer #2 · answered by oldeststudent2004 2 · 0⤊ 0⤋
When x units are sold, and 2 units are sold, x must equal 2. So, you plug in 2 for x in the equation:
p = -x/2+75
p = -(2)/2+75
p = -1+75
p = 74
The unit price when 2 units are sold is 74. Just repeat this with x =7, x = 9, and x = 11 to obtain the other answers.
2007-06-24 23:05:55 · answer #3 · answered by lithiumdeuteride 7 · 0⤊ 1⤋
just plug the numbers into the equation for x:
p=-2/2+75
p=74
p=-7/2+75
p=71.5
p=-9/2+75
p=70.5
p=-11/2+75
p=69.5
2007-06-24 23:09:39 · answer #4 · answered by shilohkid13 1 · 0⤊ 0⤋