9-5 Adding Or Subtracting Rational Expressions That Have Different Denominatb Worksheet With Answers Page 4
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y+2:;-;il
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48.
Let;j7
,.pr"r"nt
a
fraction.
If
I
is
subtracted
from
the
numerator,
then the new
fraction
formed'
50.
Let
*A
represent
a
fraction that is equivalent
to J.
ff
+
it
subtracted
from
the
numerator
and 4
is
subtracted
from
the
denominator,
the new
fraction
equals
l.
nina
the
original fraction'
51. A
fraction
is
equivalent
to
J.
If
5
is
added
to
the numerator and 5 is added
to
the
denominator'
the
fraction
is equal to
I'
finO
the
original
fraction'
52.
Pipe
A
can
fill
an
industrial tank
in
8
hours, and
pipe
B can
fill
the
same
tank in
4
hours' Let
x
represent the number
of hours
needed to
fill
the
iontt
*htn
both
pipes are
in
operation'
In
t
hour'
A fills
I
of
rhe
tank,
pipe
B
fills
I
of
the
tank, anil,
with
both
pipes
working'
I
of
the
tank is
filled'
U
.:--1
the
eqJation
I * I : j
to
find
the
time
needed
to
fill
the
tank when
the
two
pipes are
working
together.
53. If Felix
takes
12
hours, and Oscar takes 8 hours,
to paint
an average
room'
how long
will
it
take
working
together, to
paint
an
average room?
54.Ifoneclerktakes20minutestosortthemail.andasecondclerktakes30minutestodothesame
howmanyminuteswillbothclerks,workingtogether'taketosortthemail?
55.
Laura
and
charlie
do
yard
work
each week
for Mrs' Macrina' when
Laura works alone'
she mkes
3
hours
for
the yard
work;
when
she
and
charlie work
together,
they do
the
job
in
2
hours' How lt
l_r
m+10'
does
Charlie
take to do the
yard
work if
he
works
alone?
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