In order to solve this problem,
you will want to be sure to fully understand
the problem and what you are to find. For this
problem you need to only take the information
that you are given in the problem and put it
into a mathematical expression so that you or
someone else may solve it. You do not have to
solve the expression.
To begin organizing the information into a
mathematical expression, let's begin by seeing
what one load of laundry will cost Sandy.
To wash one load of laundry it costs $1.25.
To dry a load of laundry it costs $.25
for 10 minutes. However, each load will need
to have 30 minutes to dry. So, to dry one load
of laundry it costs 3 times $.25.
Now let's put the information above into a
mathematical expression to show the cost of
one load of laundry.
$1.25 to wash + (3 x $.25 to dry)
$1.25 + (3 x $.25)
Since you found the expression to find the
cost of one load of laundry, all you need to
do is to multiply that expression by 5, since
Sandy has to do 5 loads.
Therefore, you end up with the following:
[$1.25 + (3 x $.25)] x 5
With brackets around the portion of the expression
that shows one load of laundry, you have the
answer found with letter B, [$1.25 +
(3 x $.25)] x 5
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