The rectangle below has an area of x^2- 9 square meters and a width of x- 3 meters.
What expression represents the length of the rectangle?
x-3
Length
x^2 - 9
Length =
meters

the formula of a midpoint between a abd b:

5 feet of chain cost $9

so the answer is 1.80

to find the unit price of an object, you divide the price by object. you are trying to find out how much an object cost per unit.

for instance, lets say you have 50lb of ice cream(object) that cost 8.00 dollars(price). to find the unit cost, we take the 8.00 and divide it by 50, which will give us .16 cents per pound. we can check this by multiplying .16 by 50 = 8.00

so

object = e2

price = d2

unit price = c2

formula for c2:

=d2 / e2

so in my example about ice cream, we would have the following.

e2 = 50

d2 = 8.00

c2 formula:

=d2 / e2

the answer is b to that quesiton