Milk Problem?

Question

Robert sells one gallon cartons of milk (4 quarts) for $3.09 and half gallon for $1.65 each. Assume that the number of cents you pay for a carton of milk varies linearly with number of quarts the cartoon holds.


Write the partcular equation espressing price in terms of quarts.
would it be Q= 1/.72 p

help me please, i cant think im sick

yeah its correct, i dont know why they put half a gallon is$1.65 each.
Just three more years till i finish school

Answer 1

P = total cost
p = price per quart
q = # of quarts
c = constant price


3.09 = 4p + c
c = 3.09 - 4p

1.65 = 2p + c
1.65 = 2p + (3.09 - 4p)
1.65 - 3.09 = 2p - 4p
-1.44 = -2p
p = .72

3.09 = 4(.72) + c
c = 3.09 - 2.88
c = .21

P = .72q + .21

What you are forgetting is that there can be a base constant price to which the variable price is added. That constant being c.

Answer 2

Q = number of quarts you buy.

If you buy a multiple of 4 quarts you will pay the whole price in gallons price , if you buy a different amount you will pay at least part of the total price in half-gallons price. You are only allowed to buy multiples of two quarts.

at the end you need an equation which says :

price = 3.09*number of gallons bought but expressed in quarts + 1.65*number of half gallons left over after you finished paying for all those gallons.

Best of Luck - Mike

Answer 3

this doesn't sound right. in order for the price to vary linearly, the price per quart must be constant, that is for example, for 4 quarts costing $3.09, then each quart must cost 1/4 of that, or $0.77, so

P = .77 * q

but that equation doesn't hold for the half gallon. are you sure you have the question correct?

-SelAorm

Answer 4

Yikes! I'm glad I am done with school! WHEW!

Answer 5

i dont know.