1.
Solve
for
x
by the method of determinants.
A.
B.
C.
11
D.
Hint
2.
Solve
by the method of determinants.
A.
B.
C.
D.
Hint
3.
Vince and Brian each need two kinds of items at the store. Vince bought 10 of item
A
and 14 of item
B
and spent $97. Brian bought 8 of item
A
and 25 of item
B
, and spent $119. How much did each item cost?
A.
item
A
= $5.50
item
B
= $3
B.
item
A
= $4.50
item
B
= $3
C.
item
A
= $5
item
B
= $3.50
D.
item
A
= $750
item
B
= $3.50
Hint
4.
Solve
by the method of determinants. Round to the nearest hundredth.
A.
(1.68, 4.40)
B.
(1.86, 2.20)
C.
(2.46, 1.20)
D.
(-1.86, -2.20)
Hint
5.
Which method of finding solutions would work best to find the solutions to the system
and state why?
A.
determinants and matrices, because there are fewer calculations
B.
adding and multiplying
C.
adding or subtracting
D.
substitution
Hint