Multiple Choice
Identify the
choice that best completes the statement or answers the question.
|
|
|
1.
|
Determine whether  is a
solution of the system of equations.
|
|
|
2.
|
Is (–4, 3) a solution of the following system
of equations?
|
|
|
3.
|
Solve by the addition method:
 | | | | | | | | | | | | | | ) | | | | | |
|
|
|
4.
|
|
|
|
5.
|
| A plane flying with the jet stream flew from Los Angeles to Chicago, a
distance of 1080 mi, in 3 h. Flying against the jet stream, the plane could fly only 720 mi in the
same amount of time. Find the rate of the plane in calm air and the rate of the
wind. | | | | | | | | | | | | | | | | | | | |
|
|
|
6.
|
39. | A baker purchased 12 lb of wheat flour and 14 lb of
rye flour for a total cost of $18.16. A second purchase, at the same prices, included 14 lb of wheat
flour and 13 lb of rye flour. The cost of the second purchase was $18.72. Find the cost per pound of
the wheat flour and the rye flour. | | | | | | | | | | | | | | | | | | |
a. | Wheat: $0.74; rye:
$0.65 | d. | Wheat: $0.67; rye:
$0.74 | b. | Wheat: $0.55; rye:
$0.74 | e. | Wheat: $0.65; rye: $0.74 | c. | Wheat: $0.65; rye: $0.71 |
|