1.
What is the value of the determinant?
A.
12
B.
-8
C.
-3
D.
-12
Hint
2.
Use Cramer's rule to find the value of
x
in the system of equations.
A.
B.
C.
D.
Hint
3.
Find the determinant of
A.
-21
B.
-16
C.
-11
D.
0
Hint
4.
Solve the system –2
x
– 4
y
= 7, 3
x
+ 5
y
= 9.
A.
B.
(71, –39)
C.
D.
Hint
5.
Two sides of an angle are contained in lines whose equations are 6
x
+ 4
y
= 15 and 7
x
– 9
y
= 3. Find the coordinates of the vertex of the angle. Round to the nearest hundredth.
A.
(1.79, 1.06)
B.
(147, 87)
C.
(–1.79, 1.06)
D.
(–147, –87)
Hint