**Unformatted text preview: **(c) Q =
9 −4 −2
1 2x ln(x)
1
1
0 −3 0
x3
x3
(d) L = 2 −2
8 7
3 − x4 1−3xln(x)
(h) H = 4 −5
0 16 0 4
6 −3
1
0
41
4 −3 (e) F = 3
1
2
6
2. Use Cramer’s Rule to solve the system of linear equations. x+y+z
3x + 7y = 26 (a)
2x − y + z
5x + 12y = 39
(d) −3x + 5y + 7z
x + y = 8000 (b)
0.03x + 0.05y = 250 3x + y − 2z =
y
x
4x − y + z =
(e)
2−5 = 1 (c)
x − 3y − 4z =
6x + 7 y = 3
3. Use Cramer’s Rule to x1 − x3 2x2 − x4
(a) x1 − 2x2 + x3 −x3 + x4 =3
=0
=7
10
5
−1 solve for x4 in the following systems of linear equations. 4x1 + x2 =
4
= −2 =
0
x2 − 3x3 =
1
(b)
=
0
0 10x1 + x3 + x4 = −x2 + x3 = −3
=
1 4. Find the inverse of the following matrices using their determinants and adjoints. 12 −7
4
6 −3
(a) B =
−5
3
4 −3 (b) F = 3
1
2
6
5. Carl’s Sasquatch Attack! Game Card Collection is a mixture of common and rare cards.
Each common card is worth $0.25 while each rare card is worth $0.75. If his entire 117 card
collection is worth $48.75, how many...

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