Answer:
Step-by-step explanation:
Dominique wants to buy liters of water.
Case 1:
A half-liter of water costs .
The half-liters is
liter => The cost of a liter of water (
) is calculated by multiply the cost of
half-liter by
:
x
=
=> The cost of two liters: =
x
=
x
=
$
Case 2:
A quarter-liter of water costs .
The 4 quarter-liters is liter => The cost of a liter of water (
) is calculated by multiply the cost of
quarter-liter by
:
x
=
=> The cost of two liters: x
=
$
Compare and
, the cost of second buying method is more expensive.
=> She should buy the water, in which a half-liter of water costs $
Hope this helps!
:)