1.
Write a matrix for the system of equations.
A.
B.
C.
D.
Hint
2.
Write the matrix equation
as a system of linear equations.
A.
-2
s
+
t
= 12
5
s
+ 8
t
= 7
B.
-2
s
= 7
5
t
= 12
C.
-2
s
+
t
= 7
5
s
+ 8
t
= 12
D.
-2
s
+ 5
t
= 7
s
+ 8
t
= 12
Hint
3.
In a sport similar to football, there are two ways to score: by the run or by the pass. Team A scored 244 points, while Team B scored 273 points. Team A scored by the pass 21 times, and by the run 11 times. Team B scored by the pass 27 times, and by the run 6 times. How many points is each score worth?
A.
pass = 5 pointsrun = 9 points
B.
pass = 7 pointsrun = 14 points
C.
pass = 9 pointsrun = 5 points
D.
pass = 5 pointsrun = 23 points
Hint
4.
Which of the following is a matrix equation for the system 5
x
– 3
y
=11, –3
x
+ 2
y
= 7?
A.
B.
C.
D.
Hint
5.
Suppose a matrix equation of a system of equations does not have a unique solution. What cannot be true?
A.
B.
C.
is undefined
D.
ad
–
bc
? 0
Hint