MATH
24O
R
.
Johnson
[151
1
.
Let
E
=
fO
1
-2'
1 1
if
10
1
-3
EXAM
F
=
(
1
0
-3)
Oct.
if,
Perform
the
following
operations
when
possible.
is
not
possible,
explain
why.
If
an
operation
(a)
EF
(
b
)
FE
2
(c)
(d)
F
[2O]
Solve
simultaneously
the
systems
(a)
x
-
2
x
12
x
=
-
2
3
2x
-5x
->-
x
=
1
123
3x
-
7x
1
2
(b)
x
-
2
x
+
x
123
2x
—
5x
+
x
1
Z
3
3x
-
7x
+
2x
123
E2O]
3
Calculate
the
cofactor
matrix
of
A
='
37
Use
this
to
compute
adj<A)
and
A
-i
[151
if
Wha
ondition
on
a
,
b
,
c
will
ei
e
that
this
system
is
consistent?
x
-»-
2y
-
2z
=
a
y
+
5z
=
b
3x
+
7y
-
z
=
c
[15]
5.
Solve
by
Cramer's
rule
x
+
2x
=
it
2
3
2x
+
ifx
+
3x
=
-2
1
Z
3
3x
+
7x
+
6x
123
0
CONTINUED
ON
OTHER
SIDE
